2. Fishacre and the Remaking of the relationship between theology and philosophy

As the first to comment on Lombard’s Sententiae at Oxford, Fishacre’s discussion of theology in I Sent., prol. is critical when it comes to understanding the transition which was at work at Oxford during the 1240s concerning the sacred science’s nature and purpose.Footnote ⁵ As indicated above, where earlier theologians at Oxford, typified by the likes of Grosseteste and Robert Bacon OP, had understood theology to consist primarily of scriptural exegesis and had, in turn, regarded doctrinal speculation – which often took the form of scholastic quaestiones – as something which was to be woven into the moral and spiritual excursus characteristic of biblical reflection, the new way of doing theology, typified by Lombard’s Sententiae, adopted a different approach, one which Fishacre argues lays the basis for a clarification of the relationship between theology and philosophy, yet is still faithful to the primacy of scripture.Footnote ⁶ In short, Fishacre argues that there are two different branches of theology. These correspond to the division between the soul’s faculties of will and intellect – or what he terms the ‘virtus motiva’ and the ‘virtus apprehensiva’.Footnote ⁷ The first, so he notes, has a practical orientation. This is that branch of theology which leads the soul to God by promoting the will’s desire for piety and goodness – this, of course, is that strand of theology which is associated with biblical exegesis.Footnote ⁸ By contrast, the second strand of theology – the doctrinal speculation associated with lecturing on Lombard’s Sententiae – aids the soul’s return to God by means of perfecting the intellect through the use of illuminated reasoning to elucidate the doctrine communicated in scripture.Footnote ⁹ Theology, in Fishacre’s judgement, thus perfects the whole of the human soul: both the will and the intellect. It is for this reason that it is the noblest science.

Having established that theology in se possesses different modes of operating, Fishacre turns to its relationship with philosophy. He notes that there are three books available to the soul as it seeks to ascend to God. The first, and ‘the most noble’ (nobillisima), is the ‘liber vitae’ – this is the eternal knowledge which God has of Himself and of all created reality.Footnote ¹⁰ However, given that the ability to read this book is the privilege of the blessed in heaven, Fishacre judges that the liber vitae is ‘inaccesibilis’ to us in via.Footnote ¹¹ The second book is the ‘liber scripturae’.Footnote ¹² This contains the infallible revelation revealed to the patriarchs, prophets, and apostles. In this book, God communicates all that is necessary for salvation. Conversely, the third book is the ‘liber creaturae’.Footnote ¹³ This is the natural world in which vestiges of God’s wisdom are found in creatures in the same way that an artist’s skill is known through her works. Crucially, both the liber scripturae and the liber creaturae form are an integral part of Christian noetic as each reflects something of the eternal knowledge found in the liber vitae: ‘and each of these is necessary for the manifestation of that which is in the libro vitae’.Footnote ¹⁴ Fishacre notes, however, that, in the current order at least, the liber scripturae takes precedence over the liber creaturae. This is so because the disfiguring effects which the fall has had upon the soul mean that it cannot read the liber creaturae fully without the liber scripturae’s assistance. Prior to the fall, however, this was not the case. The innocent mind could read the liber creaturae with ease, as its rectitude meant that it could retrace all creatures back to God without any need of scriptural illumination.Footnote ¹⁵ In isto statu, however, this is not the case. As a result, the liber scripturae is the ‘most perfect, the most orderly, and the most certain’ source of noetic which we have, both with respect to God and, crucially, the natural world.Footnote ¹⁶

Fishacre contends that if theology, both in its biblical and speculative dimensions, corresponds to the study of the liber scripturae, then philosophy, at least when properly construed, takes as its focus the liber creaturae. Footnote ¹⁷ Philosophy, so Fishacre argues, has the task of revealing the secrets of nature. Critically, however, its purpose is not only to uncover how the machina mundi works – i.e., to describe it at the level of physics – but also to show how the truths found within creatures serve to support those revealed in scripture. Fishacre qualifies this claim, however, by noting that we assent to the truths of scripture on account of its authority and infallibility, not because of any demonstrations which philosophy provides.Footnote ¹⁸ At this level, while it may be a distinct scientia in its own right, philosophy’s chief identity is as the ‘handmaid’ (ancilla) of theology.Footnote ¹⁹ ‘[I]t is at once known’, Fishacre writes, ‘that all the other sciences are the attendants (pedisequae) and handmaids of this one science [sc. theology]’.Footnote ²⁰ On the surface at least, Fishacre thus posits what looks like a strictly hierarchical, classically ‘Augustinian’ relationship between theology and philosophy; that is to say, one in which the sacred science not only takes precedence over all the other sciences but draws upon them as supporting aids.Footnote ²¹ In turn, philosophy’s ancillary role would seem to be confirmed by Fishacre’s claim that the liber creaturae cannot be read correctly without the liber scripturae’s guidance. Philosophy, at one level, thus appears to be both subservient to, as well as, dependent upon, theology. Crucially, however, Fishacre counterbalances this hierarchical outlook by introducing three important corollaries – ones which, as we will see, are, critical to his creative reading of theology’s relationship to philosophy.

First, theology – and therefore the theologian herself – ought not to exist in isolation from the lower philosophical sciences. Instead, theology has a duty to be versed in the learning of all its ancillary disciplines, for these have much to teach the sacred science.Footnote ²² As an analogy of this truth, Fishacre notes the story of Abraham in Genesis 16:1-4. As the Patriarch was unable to conceive a son with Sarah, his wife, until he had first ‘known’ his servant Hagar, so the theologian cannot bear fruit in his own discipline unless he first ‘knows’ the learning of the lower sciences.Footnote ²³ ‘For no one approaches the mistress, especially in the privacy of her chamber’, Fishacre contends, ‘unless he first becomes familiar (nisi prius familiaris) with the host of maids who will introduce him’.Footnote ²⁴ At this level, therefore, while theology may be superior to philosophy, it is nonetheless dependent, at a certain level, upon the learning of its lower counterpart in order to succeed in its own noetic field. Fishacre’s second point, or so it seems, stems from this truth. Theology’s role in supporting philosophy’s efforts to read the liber creaturae extends beyond simply guiding it away from heterodox positions or showing how its truths harmonise with those of faith. Instead, theology itself, as the curative medium between the two extremes of the liber vitae and the stained liber creaturae, is called to support philosophy by speaking on points of philosophical dispute and, where necessary, opening up new philosophical horizons, ones which unaided reason cannot discover. Thus, to return to the analogy of Genesis, for Fishacre, Hagar does not simply lie prostrate before Sarah and offer her services to her mistress. Instead, both the handmaiden and her mistress walk alongside one another, akin to sisters, with each supporting the others efforts to elucidate how God communicates Himself to them in their own respective disciplines.

Although this second correlative point is not explicitly stated by Fishacre in his use of Sarah and Hagar to explain theology’s and philosophy’s relationship in I Sent., prol., it is, nonetheless, I suggest, hidden within it. Its presence, however, only becomes clear when Fishacre’s thinking in I Sent. prol. is read in the light of how theology and philosophy relate to one another in practice within the rest of his Sententiae commentary, and indeed, his broader theological and philosophical oeuvre. Key examples of theology’s ability to aid its ancilla in her daily chores are, I suggest, provided by Fishacre’s invocation of the risen Christ’s body to support his controversial claims concerning the nature of light and the celestial bodies. As we will see, when considered from the perspective of these two examples, we discover that for Fishacre theology’s role in illuminating philosophy extends to entering into the fray of everyday points of philosophical dispute and helping the philosopher resolve these through the assistance of its supernatural knowledge. Thus, although she is Hagar’s mistress, Sarah is not averse to stepping down from her privileged position so as to help her servant perform her daily chores and, crucially, helping her to find better ways of doing these. In part, this mutually enriching relationship between theology and philosophy is grounded in the fact that, ultimately, both the liber scripturae and the liber creaturae, despite their differing noetic value, are revelatory handmaids of a superior noetic – namely, the divine noetic of the liber vitae.Footnote ²⁵ As we will see, this model of theology’s relationship to philosophy leads to a situation where the boundaries between theological and philosophical learning run very close to one another, and, depending on how one views it, potentially risks the lumen fidei overly intruding into the lumen rationis and displacing ratio as the foundation of natural philosophy.

Theology’s ability to illumine philosophical debate points to Fishacre’s third corollary. As indicated already, while the sacred science may take the liber scripturae as its chief focus the liber creaturae does nonetheless still fall within the scope of its study. Crucially, however, it reads the liber creaturae in a manner different to natural philosophy. Where the latter studies the creature at the level of motion and its material identity, theology, by contrast, views it as a mirror (speculum) in which something of the Trinitarian mystery is reflected. Thus, as Fishacre explains in II Sent., prol., while it is most proper for ‘the theologian to know God rather than creatures’, the creature nonetheless functions as a theophany of the divine mystery and thus has an intrinsic theological value and identity.Footnote ²⁶ As such, each creature, like each passage of scripture, is a reflection of the bright and inaccessible light that is God’s infinite wisdom. Thus, in the same way that we cannot gaze at the sun directly, but we can look at it as it is reflected in a mirror, ‘so these creatures are the mirror through which the sun of intelligence (sol intelligentiae) is seen by our weak eyes’.Footnote ²⁷ Critically, Fishacre warns against the theologian forgetting this truth and succumbing to the temptation of curiositas – i.e., becoming overly concerned with what is most properly the object of natural philosophy.Footnote ²⁸ Thus, to return to the analogy of Hagar and Sarah, Fishacre notes that when the mind of the theologian which has become ‘dimmed by worldly knowledge’ is ‘plucked from the bosom of handmaids’ (a sinu ancilliarum avelluntur) and ‘offered to the embraces of the mistress’ he is unable to impregnate her and his theology fails to bear fruit.Footnote ²⁹

3. Fishacre on Christ’s resurrected body and the physics of light

While we may assume that the study of light was something which did not arise until the Enlightenment, in reality discourse about light and its behavioural properties was something which was central to medieval natural philosophy, both in its Christian and Islamicate forms. In particular what exercised the mind of the medieval physicist was the question of whether light (lumen) – at least insofar as it exists in a transparent medium, such as air, water, or the celestial spheres – is a body or not. Perhaps unsurprisingly, most writers of the thirteenth century looked to Aristotle for instruction on this question. In his De anima, the Greek Philosopher states that light is not ‘any kind whatsoever of body nor an efflux from any kind of body’.Footnote ³⁰ As a result, the general consensus amongst medieval thinkers was that light in medio is not a corpuscular reality, but rather a ‘form’ or an ‘intentional likeness’. It is, in other words, something which is emitted into a transparent medium by a luminous body (i.e., fire, the sun, etc.) as a representational likeness of that body’s substantial identity qua luminous. As a result, light inheres within a medium as an accidental quality of it. Such was the position articulated by the likes of Albert and Aquinas, as well as Fishacre’s Oxford confrères Richard Rufus of Cornwall and Roger Bacon.Footnote ³¹ One of the chief reasons why Aristotle and, in turn, his Latin disciples, rejected the claim that light is a body is that were this the case then it would prohibit it from passing through transparent mediums.Footnote ³² After all, it is an irrefutable fact, so the Aristotelian position states, that no two bodies, irrespective of how small or rarefied they may be, can occupy the same place at the same time. It is clear, however, that both air and water are bodies, and yet light passes through them. Indeed, it does so with great ease and speed. As a result, light cannot be a body but must instead be a form.Footnote ³³

Given that light’s ontological identity was a subject which exercised many of Fishacre’s contemporaries, most famously Grosseteste – who it is important to note, Fishacre held in high regard irrespective of the bishop’s efforts to curtail his theological endeavours – it is not surprising to find that the Oxford Dominican also devoted much attention to the subject. Indeed, during his time as magister regens at Oxford, Fishacre conducted a public disputation specifically devoted to light – his Quaestio de luce.Footnote ³⁴ In this text, Fishacre goes against the prevailing scholarly consensus by arguing that light in medio is not a form, or some quasi-spiritual reality – as the Islamicate scholar Averroes had argued – but instead is a true body. In adopting this position Fishacre not only set himself at odds with Aristotle and the majority of his contemporaries, but he came surprisingly close to articulating something akin to the corpuscular theory of light advocated by Newton several hundred years later. To support his novel position, Fishacre advances several highly innovative arguments based on reason and experience. One such argument is that the corporeal nature of light is demanded by the perfection of the universe. Fishacre’s logic here is striking. He notes that, on the one hand, God creates some creatures which consist of form and matter – such is the case with the angels; and on the other hand, He also creates creatures which have only form – i.e., the soul. This would suggest, so Fishacre contends, that God must also create a third genus of creature, one ‘consisting of matter alone’.Footnote ³⁵ After all, were this not the case, then God’s creative fecundity would not be exhausted – thus meaning some form of imperfection could be attributed to God – but the universe itself would be incomplete. Given its unique properties, Fishacre contends that the only creature which fits the bill for this third genus of creatures is light. He writes:

While Fishacre’s logic here reveals the ingenuity of his arguments ex ratione, it is his response to Aristotle’s chief argument against the corporeal nature of light – i.e., that no two bodies can occupy the same place at the same time – which elicits his most creative reasoning, and it is here that his novel understanding of theology’s ability to speak into philosophical debate comes into play. Fishacre’s response to Aristotle’s objection is simply to deny outright his claim that no two bodies can occupy the same place at the same time.Footnote ³⁷ He notes that, while Aristotle’s thesis does indeed hold true according to the ordinary workings of nature, there are nonetheless exceptions to this rule – exceptions which scripture alone reveals. Thus, Fishacre notes that the New Testament provides clear, indeed irrefutable, evidence of how two bodies can simultaneously occupy the same place and pass through one another – namely, the example of the risen Christ. John 20:19-21 describes how the risen Christ entered into a room by passing through a locked door.Footnote ³⁸ Crucially, the resurrected Christ – just like all other glorious bodies – was no ghost. Instead, he possessed the same body which he had prior to his resurrection. Fishacre contends that the explanation of how Christ passed through the locked door is that the matter of his resurrected body had been transfigured in such a way that it was of a glorified and highly rarefied nature.Footnote ³⁹ This meant that, while it was still a truly a corporeal reality, it could do what most other bodies cannot – i.e., occupy the same place as another other body and pass through it.Footnote ⁴⁰ What all this means, so Fishacre insists, is that Aristotle’s claim that no two bodies can simultaneously occupy the same place is emphatically incorrect. Proving that which reason judges to be incredulous, scripture shows that certain bodies can indeed occupy the same space as other bodies, and, when required, pass through them. Light, so Fishacre notes, is one such body. He summarises his thinking thus:

Perhaps not surprisingly, Fishacre’s thesis provoked sharp criticism. Thus, Richard Rufus of Cornwall was quick to point out that several nonsensical consequences follow on from Fishacre’s corpuscular theory of light. For example, were light a body then this would suggest that the matter of the luminous object which emits it – i.e., the sun – would diminish over time.Footnote ⁴² It is clear, however, that this is not the case. The sun’s brightness never changes nor does the sun itself ever appear to get smaller. It is, Bonaventure, however, who gives the firmest rebuttal of Fishacre’s thesis.Footnote ⁴³ Like Rufus, he seeks to undermine the veracity of Fishacre’s various ‘proofs’. Thus, he notes that Fishacre’s argument that the corporeal nature of light is demanded by universal perfection is nonsensical. This is so because matter, by its very nature, cannot exist without form.Footnote ⁴⁴ As a result, not only would it be impossible for God to create matter independent of form but even if God were to do this it would undermine, rather than perfect, the universal order.Footnote ⁴⁵ Particularly striking, however, is Bonaventure’s response, or lack thereof, to Fishacre’s invocation of Christ’s resurrected body to prove that light is corporeal. Where Rufus at least acknowledges this aspect of Fishacre’s thesis, though skirts round it by simply stating that, along with all of Fishacre’s other arguments, it fails to convince, Bonaventure, by contrast, passes over it in complete silence. This is surprising given the amount of space which he invests into demolishing Fishacre’s claim, and indeed that of other, more ancient, writers, that light is a body. One possible reason for Bonaventure’s silence is that he feels uncomfortable with Fishacre’s invocation of scripture to help form the basis of a controversial philosophical thesis. After all, while Bonaventure himself uses various scriptural and theological sources in his own discussion of whether light in medio is a body, he employs these in a different manner – i.e., he uses them in an ancillary way to support or contradict the arguments pro and contra for light’s non-corporeal nature. He does not use them as the basis of for advancing a novel philosophical position which sits ill with reason and experience.Footnote ⁴⁶

An alternative reading, of course, is that Bonaventure’s silence on Fishacre’s invocation of the liber scripturae to help found his novel claims concerning light’s ontology is that he regarded the Dominican’s argument as intellectually weak, rather than methodologically flawed, and thus not worth addressing. This is certainly a legitimate suggestion. Moreover, it perhaps finds some support in the fact that Bonaventure does not – as Rufus himself does – address the majority of the argumenta which Fishacre lists in his Quaestio de luce to defend his controversial thesis. However, the fact that Bonaventure – as we will see momentarily – adopts the same silent response to Fishacre’s use of the very same elements of the scriptural witness to support his controversial claims concerning the material identity of the celestial bodies suggests that the silentium Bonaventurae here is indeed more to do with Fishacre’s methodology than the perceived weakness of his argument.

4. Fishacre on the resurrected body and the nature of the stars

If Fishacre’s thinking on light reveals his willingness to challenge Aristotle’s authority and advance controversial philosophical positions, then it is fair to say that his views on the nature of the celestial bodies – i.e., the sun, moon, stars, etc. – were positively iconoclastic. In his De caelo, Aristotle teaches that the heavens – that is to say the celestial spheres and the luminous bodies nested within them – are made from the ‘quintessence’, the so-called ‘fifth element’, or as it was also known during the medieval period, the ‘ether’.Footnote ⁴⁷ This celestial element, so the Greek philosopher contends, is possessed of perfect actuality and motion. Moreover, it is eternal – and, in sharp, contrast to the four terrestrial elements (earth, air, fire, and water) it is not prone to change or decay.Footnote ⁴⁸ As such, those bodies composed of it are, by their very nature, of a superior quality to those found here on earth.Footnote ⁴⁹ That this is so, Aristotle contends, is proved by the fact that the stars and planets, unlike terrestrial bodies, never change or decay. Moreover, they possess perfect circular motion – something which terrestrial bodies never possess.Footnote ⁵⁰ In advancing this position, Aristotle adopts a stance which is sharply at odds with the one favoured by Plato and several of the early church fathers, including Augustine, John Damascene, and Bede, all of whom argued that the celestial bodies were made from the same elements found on earth.Footnote ⁵¹

Despite reservations about Aristotle’s claims about the eternal nature of the celestial bodies, almost all of Fishacre’s contemporaries accepted his claim that the stars and planets were composed of the quintessence.Footnote ⁵² Thus, both Albert the Great and Aquinas offer a full-throated endorsement of the Aristotelian claim that the celestial bodies are made of the quintessence, as does Bonaventure.Footnote ⁵³ Indeed, Albert is highly dismissive of the Platonic claim that the celestial bodies are made from fire, noting that this cannot be the case because fire’s motion is always vertical, while that of the planets, sun, and moon, is circular.Footnote ⁵⁴ Apart from a small treatise entitled De generatione stellarum (On the Generation of the Stars) which dates to around 1217–1230 and which is attributed, rightly or wrongly, to Grosseteste, the only known example of an early thirteenth century thinker who explicitly upholds the Platonic-cum-Patristic claim that the stars and planets are made ‘ex quattuor elementis’ is Fishacre.Footnote ⁵⁵ Fishacre discusses the nature of the celestial bodies in II Sent., dist. 14.Footnote ⁵⁶ Here, he openly acknowledges that, in advancing the position which he does, he is not only breaking away from the scholarly consensus but inviting serious criticism. ‘If we posit this position [sc. that the celestial bodies are made from the four earthly elements]’, he remarks, ‘then they will cry out, that crowd (turba) of Aristotelian know-it-alls (scioli aristoteli), and stone us (lapidabunt nos)’.Footnote ⁵⁷

Fishacre opens his discussion of the materiality of the celestial bodies by noting that there are three schools of thought on this subject. First, there is the Aristotelian position. Second, there is the thesis articulated by the likes of Basil of Caesarea and John Damascene – namely that the stars and planets are made from the primordial light (lux) which God created on the first day.Footnote ⁵⁸ Third, there is the Platonic belief that they are made from one or more of the four elements found here on earth, with fire appearing to be the chief element involved.Footnote ⁵⁹ Fishacre dismisses the second position out of hand. While it may make sense to claim that the sun, as the chief luminary in the sky, was made from the primordial lux, the size and brightness of the solar body, he notes, means that, following its creation, there would not have been enough of this light left needed to make all the other stars and planets.Footnote ⁶⁰ As such, all the other celestial bodies must be derived from something other than the primordial light – i.e., one or more of the four terrestrial elements. Perhaps unsurprisingly, however, it is Aristotle’s position which Fishacre devotes most of his energy to attacking. Particularly striking is his use of Aristotle’s own theory of colour to undermine his claims concerning the ethereal nature of the celestial bodies.Footnote ⁶¹ Fishacre notes that, according to Aristotle, colour represents the ‘limit of the transparent’, and, as such, is associated with opaque bodies. However, opaque bodies are always mixed bodies, and mixed bodies, as Aristotle himself acknowledges, are always derived from the four elements.Footnote ⁶² In turn, Fishacre contends that Aristotle’s claims that the quintessence is a transparent reality make little sense. For as everyday observation reveals, not only can we see the stars and planets but, as solar eclipses confirm, the celestial bodies are opaque.Footnote ⁶³ Moreover, as the moon proves, they also possess colour. All this is possible, so Fishacre argues, only if the celestial bodies are made ‘ex quattuor elementis’.Footnote ⁶⁴

It is, however, Aristotle’s assertion that it is the corruptible nature of the four elements which precludes them from forming the material basis of the stars and planets which Fishacre finds the most problematic. As with his rebuttal of the Stagirite’s argument that light cannot be a body, his response to this objection, having first outlined numerous arguments from reason to support his position, is to invoke the lumen revelationis. Fishacre notes that while, at least according to the ordinary workings of nature, bodies composed of the four elements are indeed prone to change and decay, scripture shows that there are exceptions to this rule – exceptions which physics by itself cannot discover, and which, in turn, unaided reason would judge incredible. The chief example, Fishacre contends, is the resurrected body.Footnote ⁶⁵ The resurrected body, so scripture assures us, is not prone to decay, but, along with the soul, is gifted with eternal life. Yet crucially, as Christ’s risen body proves, the post-resurrection body is still a corporeal reality, and thus it is still made from the same four terrestrial elements as it was in isto statu. Fishacre contends that the reason why the resurrected body, despite its composite nature, does not decay, is that its matter – and thereby the four elements from which it derives – is ‘sublimated’ to the eternal and unchanging nature of the heavenly realm.Footnote ⁶⁶ Through this process of ‘sublimation’, the terrestrial elements are gifted with the immutability which is associated with the heavenly state, even while retaining their original identity. Fishacre contends that openness to this process of ‘sublimation’ is innate to all bodies made of the four elements, irrespective of their position in the chain of being, but it can only be realised by means of the intervention of supernatural grace. As such, the act of sublimation does not constitute an act of violence against terrestrial matter but rather secures its perfection.Footnote ⁶⁷

Fishacre argues that it is this ‘sublimated’ nature of the resurrected body which explains why Aristotle’s argument that the stars and planets cannot be made ‘ex quattuor elementis’ fails to convince. If the lowly elements involved in the composition of the human body can be ‘sublimated’ to the eternal and unchanging identity of the Trinitarian heaven, which, after all constitutes the outermost celestial sphere, and thus the furthest away from the terrestrial realm, then how much more likely, Fishacre asks, is it that the stars and planets – which, like the blessed and the angels, are gifted with immutability yet are closer to the earth – can assimilate one or more of the four terrestrial elements to themselves. As a result, Fishacre judges that there is no sound reason for rejecting the belief that the stars and planets are made from the same elements found here on earth. He goes on to explain that, in his opinion, the celestial bodies are made of a ‘sublimated’ version of fire – one which, on account of its assimilation to the rarefied nature of the celestial realm, behaves in a manner different to terrestrial fire, yet is still made of the same substance as it. Interestingly, Fishacre contends that this igneous nature of the celestial realm is not of a uniform quality.Footnote ⁶⁸ Instead, the fire found in the uppermost celestial spheres is more rarefied and intense than that found in the lower spheres. As a result, the fixed stars and the superior planets – i.e., those which exist in the higher celestial spheres – possess a more igneous quality than do the lower ones. It is this which explains why the moon, the lowest celestial body, cannot be seen without the sun’s illumination, as the light which its igneous nature produces is not very bright.

Unlike his thinking on the corporeal nature of light, Fishacre’s denial of the ethereal nature of the celestial bodies appears to have gone relatively unnoticed, particularly at Paris. Thus, while Albert and Thomas – at least in their respective Sententiae – reveal themselves to be alert to the Platonic claims about the elemental nature of the stars and planets, they show no awareness that this thesis had found an advocate in a member of their own order.Footnote ⁶⁹ The same, however, is not true of Bonaventure. As the Franciscan’s Dubia circa litteram magistri – a text which Bonaventure composed between 1250 and 1252 as part of his preparation for his commentary on Lombard’s Sententiae – reveals he is not only alert to Fishacre’s thesis but recounts several of the highly specific arguments which the Oxford Dominican articulates to justify his logic.Footnote ⁷⁰ Thus in the third dubium question concerning 2 Sent., dist. 14, Bonaventure notes that there are certain ‘modern’ authors – he does not name them – who argue that the celestial bodies are made ‘ex quattuor elementis’.Footnote ⁷¹ Moreover, these ‘modern’ authors argue that it is a sublimated form of fire which is the chief element involved in the constitution of the celestial bodies.Footnote ⁷² Likewise, they appeal to the phenomenon of solar eclipses and the presence of colour within the stars and planets to prove that they are made from one or more of the four elements found here on earth.Footnote ⁷³ Interestingly, however, Bonaventure does not mention Fishacre’s appeal to the risen Christ’s body to establish the elemental nature of the celestial bodies. Instead, he focuses purely on Fishacre’s arguments ex ratione. As with his silence concerning Fishacre’s invocation of the risen Christ to support his corpuscular theory of light, one cannot but help wonder if Bonaventure’s reserve here communicates a certain degree of concern about Fishacre’s use of scripture to found a position in natural philosophy which not only contradicts Aristotle, whom in his Sententiae Bonaventure describes as having most ‘excelled amongst the philosophers’, but which mainstream natural philosophy judges as contrary to reason.Footnote ⁷⁴

5. Concluding thoughts – Christ and the resurrection of philosophy

As I alluded to earlier, on the surface, Fishacre’s account of theology’s relationship to philosophy in I Sent., prol. looks quite conventional, indeed traditional, in many respects. However, when one considers how theology actually relates to philosophy in the rest of his Sententiae and broader oeuvre, it becomes clear that his thinking on the sacred science’s relationship to philosophy is perhaps not as conventional as it may first appear. As we have seen, for Fishacre, theology’s role in illuminating philosophy is by no means confined to guiding it away from heresy, or, as Thomas and the likes of Albert imagine it – albeit in their own unique ways – orienting its horizons towards those of faith. Instead, its relationship to its noetic handmaid possesses a much more involved, hands-on quality, one in which theology not only steps into the fray of philosophical debate but uses its learning to show how creation can exist in a manner which is outside the ordinary and against the dictates of unilluminated reason. Of course, echoes of these ideas can be found in many of Fishacre’s contemporaries, including his Franciscan critic, Bonaventure. The crucial difference, however, is that for Fishacre the points of philosophical debate which theology casts the deciding vote on are not just the ones which threaten, or are pertinent to, the core claims of Christian faith but are, in fact, the everyday points of enquiry which natural philosophy considers. No one, for instance, would seriously claim that the questions of whether light is a body, or whether the stars are composed of the same elements found here on earth, are ones which conflict with Christian faith or risk heresy. One could be forgiven for feeling, therefore, that, despite its apparently traditional, non-threatening appearance, when it is placed into the ‘wild’ – i.e., when theory meets praxis – the Fishacreian understanding of theology’s relationship to philosophy starts to behave in an unexpected, perhaps even dangerous, manner, one where the sacred science, and through it the data of the liber scripturae, risks becoming overly involved in philosophical speculation and the distinction between fides and ratio, starts to blur or takes on a somewhat arbitrary quality.

As alluded to, one possible reason why Bonaventure and Rufus, despite refuting many of Fishacre’s arguments ex ratione, show caution concerning his arguments based on the risen Christ is that they themselves reached this conclusion. Irrespective of whether this is true or not, what is clear is that from a Bonaventurian or Ricardian understanding of the relationship between theology and philosophy – or indeed a Thomist or an Albertian perspective – Fishacre’s position looks a little odd. The fact that he invokes scripture as the basis for highly controversial opinions on what are essentially bread and butter issues in natural philosophy could be interpreted as an overreaching of theology’s rights over philosophy. However, when one views Fishacre’s thinking against his description of theology’s relationship with philosophy in I Sent. prol. a more charitable position presents itself. Critical here is Fishacre’s analogy of Abraham and his concubines. As will be recalled, for Fishacre, as Sarah could not conceive until Abraham had first ‘known’ Hagar, so the theologian cannot bear fruit at the level of scriptural or doctrinal exegesis without first embracing philosophy. However, as will also be recalled, it was argued that for Fishacre, while she may be a handmaid, Hagar’s (i.e., philosophy’s) relationship to Sarah (i.e., theology) is not one of pure servitude. Instead, Sarah, as part of her duties as Hagar’s mistress, and on account of her familiarity with Hagar’s tasks, walks alongside her handmaid and supports her in her labours. Although Fishacre does not put it quite like this, his distinctive use of the lumen revelationis within the context of his thinking on light’s ontology and that of the celestial bodies suggests that something along these lines is indeed the case. Moreover, it is implied by Fishacre’s repeated insistence that the liber scripturae helps us to read the liber creaturae by revealing truths about the natural order which unaided reason cannot discover. Thus, when he invokes the risen Christ to support his novel philosophical positions, Fishacre does not see himself as confusing the truths of the liber scripturae and the liber creaturae, or allowing Sarah’s voice to drown out Hagar’s, but rather as simply expressing the fact that both theology and philosophy are called to help us read the liber creaturae, albeit from different perspectives. Moreover, as noted above, both scientiae are handmaids of a superior noetic – the liber vitae – and as such are united in their service of it.

Perhaps another reason why Fishacre feels able to invoke the risen Christ’s body within the context of his philosophical speculation is to be found in his distinctive understanding of the incarnation itself, and, in particular, its relationship to the material order. Where his fellow Dominicans, Albert and Thomas, had remained unsure about the revisionist claims concerning the ratio incarnationis advanced by the likes of Grosseteste and Alexander of Hales – namely, that the primary motivation behind the incarnation was the fecundity of divine goodness and the completion of creation, as opposed to the need for redemption from sin – Fishacre offered a full-throated endorsement of this revisionist position.Footnote ⁷⁵ Indeed, alongside Grosseteste and Hales, Fishacre is one of the earliest, and most important, advocates of this position, and the first within the Dominican tradition to publically promote it. Echoing Grosseteste’s logic in his De cessatione legalium, Fishacre argues that Christ’s incarnation represented not only the most perfect diffusion of God’s goodness in time and space but that it served as the crowing of creation itself. Through the union of Christ’s humanity with his divinity, the natural order was completed and brought to perfect rest. This is so because, through it, the egressus and regressus pattern of creation itself was realised fully. ‘[A]nd so the circle of the universe is complete’, Fishacre writes, ‘and therefore perfect’.Footnote ⁷⁶ Indeed, creation’s completion through the incarnation is so perfect that ‘no addition is possible’.Footnote ⁷⁷ It is worth noting, by way of an aside, that Fishacre’s Oxford opponent in the field of light studies, Richard Rufus of Cornwall, is especially scathing of his claims regarding the ratio incarnationis, and, in turn, Grosseteste’s. According to Rufus, the logic which Fishacre, and the likes of Grosseteste and Alexander of Hales, articulate renders the incarnation a product of necessity rather than gratuitous divine volition, and, as such, devalues its salvific and miraculous nature.Footnote ⁷⁸

If the natural order finds its perfection in the person of the incarnate Christ, then this suggests, so it would seem, that Christ himself is integral to understanding the liber creaturae, not just at a theological level, but also at the level of natural philosophy. After all, since Christ’s resurrection represents the final, and therefore definitive, word in the hypostatic union’s transformative effect upon Christ’s humanity – and, by extension, the natural order itself – then it is in the resurrected Christ’s body that matter (the object of natural philosophy) achieves its fullest identity, and the world itself qua material becomes most fully intelligible.Footnote ⁷⁹ This, of course, is not to say that Christ is the proper object of natural philosophy, or that the natural philosopher should read the liber creaturae chiefly through the medium of the liber scripturae, as the theologian is called to do – for if this were the case then Fishacre would indeed be guilty of collapsing theology into philosophy. Rather what the Oxford Dominican is articulating – as his use of Christ’s resurrected body to support his thinking on light and the stars implies – is something more subtle. The liber scripturae, as the chief source of our noetic about the risen Christ, aids the natural philosopher as she seeks to read the liber creaturae by expanding her noetic horizons. It does so not by making revealed data about matter’s perfect state in the risen Christ the subject of philosophy, but rather by allowing the illumination of this data to communicate to the natural philosopher that matter can exist and behave in ways which her reason, prima facie at least, judges impossible. Thus, by way of analogy, in the same way that in a game of curling, the players use brooms to sweep the ice so that the curling stone may travel further, and thus achieve its true potential, so at the level of natural philosophy the liber scripturae seeks not to dictate the content of the philosophical science but rather to allow natural philosophy to reach its true potential by discovering all the different ways in which matter can exist. At this level, we thus see that, while Fishacre’s use of Christ’s resurrected body to support his novel claims concerning the nature of light and the material composition of the stars may not conform to the descriptions of theology’s relationship to philosophy as articulated – albeit in varying ways – by the likes of Bonaventure, Rufus, Thomas, etc., the spirit with which he makes this move is perhaps not as far removed from theirs as it may first appear. In the Fishacreian synthesis, theology and philosophy are very tightly woven together – and, on occasion, produce novel patterns – yet, crucially, the distinction between the two scientiae remains intact.