Of God and His Creatures

This last is in substance the whole argument of Chap. XIII. St Thomas is thinking of such an instance in the first place as the birth of a child, or the growth of a crop of wheat. Intellectual agents have some limited power of educing themselves from potentiality to actuality, e.g., from armed peace to war: but their case is not under consideration here.

Of God and His Creatures: 1.16