1p26d.md (507B)
1 That by which things are said to be conditioned to act 2 in a particular manner is necessarily something positive (this is 3 obvious); therefore both of its essence and of its existence God 4 by the necessity of his nature is the efficient cause (Props. 5 xxv. and xvi.); this is our first point. Our second point is 6 plainly to be inferred therefrom. For if a thing, which has not 7 been conditioned by God, could condition itself, the first part 8 of our proof would be false, and this, as we have shown is 9 absurd. 10 11