On Rewards and Punishments (61-62)

And every one of these three individuals has in the account which we have received of him a figurative meaning concealed below it, which we must now consider. Now the moment that any one is taught anything, it happens to him to forsake ignorance and to come over to knowledge; and ignorance is a thing of a multiform character: on this account the first of the three is said to have had many children, but not to have thought any one of them worthy for him to call his son, except one: for in a manner he who learns discards the offspring of ignorance, and repudiates them as inimical and hostile to him.

Now by nature all we who are men, before the reason that is in us is brought to perfection, live on the borders between virtue and vice, without ever inclining as yet to either side: but when the mind, beginning to put forth its wings, sees an appearance of the good with its whole soul, impressing it in all its parts, it immediately bursts through all restraint, and being borne on wings rushes towards it, leaving behind the kindred evil which was born with it, which it flees from, proceeding in the other direction without ever turning back: