Part 1428

le fashion, certain seeds lie hidden in the corporeal things of this world."

* I answer that, * It is customary to name things after what is more perfect, as the Philosopher says (De Anima ii, 4). Now in the whole corporeal nature, living bodies are the most perfect: wherefore the word "nature" has been transferred from living things to all natural things. For the word itself, "nature," as the Philosopher says (Metaph. v, Did. iv, 4), was first applied to signify the generation of living things, which is called "nativity": and because living things are generated from a principle united to them, as fruit from a tree, and the offspring from the mother, to whom it is united, consequently the word "nature" has been applied to every principle of movement existing in that which is moved. Now it is manifest that the active and passive principles of the generation of living things are the seeds from which living things are generated. Therefore Augustine fittingly gave the name of "seminal virtues" [seminales rationes] to all those active and passive virtues which are the principles of natural generation and movement.

These active and passive virtues may be considered in several orders. For in the first place, as Augustine says (Gen. ad lit. vi, 10), they are principally and originally in the Word of God, as "typal ideas." Secondly, they are in the elements of the world, where they were produced altogether at the beginning, as in "universal causes." Thirdly, they are in those things which, in the succession of time, are produced by universal causes, for instance in this plant, and in that animal, as in "particular causes." Fourthly, they are in the "seeds" produced from animals and plants. And these again are compared to fu