Kant talks about God (and hence religion) in both the theoretical mode and the practical mode. In very broad strokes, his signal contribution to the philosophy of religion consists in a displacement of religious concerns from the theoretical to the practical domain: Rather than being an object of knowledge, Kant's God is a necessary posit for thoroughly moral conduct. God's role in the theoretical domain is the purely formal one of suggesting an ultimate coherence at the end and foundation of empirical inquiry.
Tonight will feature a live, cooperative reading of the Critique of Pure Reason A568/B596 and following. In these pages, Kant first discusses what ideals in general are (with some particularly keen remarks on moral ideals) and then turns to "God" as the concept of an ontological ideal.
This part of the Critique offers one of the most rigorous and systematic expositions ever written of what could possibly be meant by "perfect being". Kant's prose style almost guarantees that we won't get far in the text itself, but the richness and clarity of his thinking will more than make up for that.