In a familiar passage from a letter to W. S. Landor, Wordsworth exposed, as I see it, the central purpose of his art: “Even in poetry it it the imaginative only ... that which is conversant (with), or turns upon infinity, that powerfully affects me.” “Things,” he said, had to be lost in each other and limita to vanish; otherwise he was indifferent. The argument of this essay is intended to suggest an approach to Wordsworth at the poetic level of infinity. This is the realm of pure universals, the insight of poetry which reveals a state of being independent of sensuous limitations. In the sense of Hegel it is the level of reality, possessing a wholly independent being, as opposed to that of appearance, depending wholly in its existence upon the senses. The exact nature of reality remains, of course, a question for pure philosophy; and it is probable that the discipline of philosophy rather than that of literary criticism must judge finally the dialectic of poetry concerned with infinity. Yet the highest attainment of the fine arts is clearly an act of turning upon the infinite, an invocation in the observer or the listener of a sense of endlessness. Medium, form, and technique are the approaches to the ultimate experience inherent in a particular work. As artistic acts from the world of appearance, they may be analyzed and defined by the particular critical disciplines concerned with them. At the end of these functions lies the problem of philosophy. What is the nature of the wholly independent being which all great art attains? Wordsworth implies in his statement to Landor that awareness of the infinite is the final objective of poetry. My purpose is to investigate the method of Wordsworth's thought at the threshold of this objective rather than to define philosophically what the sense of infinity, in itself, contains. It seems clear that nothing more need be said upon the imaginative process as this is explored in Wordsworth's Prefaces or interpreted by his critics.