In what, therefore, can it be defective, since it is perfect?
It cannot want understanding and reason, for they are the most desirable of all qualities.

The same Chrysippus observes also, by the use of similitudes, that everything in its kind, when arrived at maturity and perfection, is superior to that which is not--as, a horse to a colt, a dog to a puppy, and a man to a boy--so whatever is best in the whole universe must exist in some complete and perfect being.

But nothing is more perfect than the world, and nothing better than virtue.

Virtue, therefore, is an attribute of the world.

But human nature is not perfect, and nevertheless virtue is produced in it: with how much greater reason, then, do we conceive it to be inherent in the world! Therefore the world has virtue, and it is also wise, and consequently a Deity.
XV.