In the second volume of his Systematic Theology, William Lane Craig raises a number of issues against the traditional doctrine of divine simplicity, along with several criticisms of Aquinas’s notion of existence. We can’t respond to all of his complaints here – but we can respond to what are, in our estimation, the most fundamental to his case.
Our focus will be on two of the main problems he presses against Aquinas’s view of existence: first, whether it makes sense to talk about existence itself as existing; and second, whether existence comes in degrees. These challenges are closely related – both, ultimately, concern the classical theist claim that God is identical to His own existence – and so our answers will be related as well.
We’ll conclude by raising a challenge for Craig.