Can a Thomist reason to God a priori?
Feast Day of St Thomis Aquinas (March 7)
A priori knowledge, as modern philosophers use the term, is knowledge that can be gained independently of sensory experience.
Aquinas famously rejected Anselm’s argument, and Thomists have tended to follow him in doing so. It might seem that they are thereby committed to rejecting the possibility of reasoning to God’s existence a priori. This conclusion might seem to be reinforced by the fact that Thomists follow Aristotle in holding that no knowledge is possible for human beings without sensory experience, and reject the standard alternative views (Platonic theories of knowledge as recollection, Augustinian illumination theories, and rationalist theories of innate ideas).