but he gives no argument that the First’s existence entails the existence of other things. Rather, he seems to rely on the argument that since other things in fact exist, their existence must ultimately be caused by the First; his main concern is not to show that the First causes the existence of other things, but to show how it causes the existence of other things, and in particular to show that that by which the First causes the existence of other things is identical with its essence, just as