Although modern thought tends to assume a sharp disjunction between philosophy and theology, it is not at all obvious how to distinguish them in a principled way. Suppose that we take philosophy in the broadest sense to be the systematic use of human reason in an effort to understand the most fundamental features of reality, and suppose that we take theology in the broadest sense to be the study of God and all things in relation to God. Then we should expect to see considerable overlap between the two: after all, God, if there is a God, is surely one of the fundamental features of reality, and one to which all the other features presumably relate.