What hinders then, but that a man, who has been once temperate, should be so no longer, and that he who has led a good life at one time should not do so at another?
I should think, therefore, that the being of all virtues, and chiefly of temperance, depends on the practice of them: for lust, that dwells in the same body with the soul, incites it continually to despise this virtue, and to find out the shortest way to gratify the senses only.
Thus, whilst Alcibiades and Critias conversed with Socrates, they were able, with so great an assistance, to tame their inclinations; but after they had left him, Critias, being retired into Thessaly, ruined himself entirely in the company of some libertines; and Alcibiades, seeing himself courted by several women of quality, because of his beauty, and suffering himself to be corrupted by soothing flatterers, who made their court to him, in consideration of the credit he had in the city and with the allies; in a word, finding himself respected by all the Athenians, and that no man disputed the first rank with him, began to neglect himself, and acted like a great wrestler, who takes not the trouble to exercise himself, when he no longer finds an adversary who dares to contend with him.
If we would examine, therefore, all that has happened to them; if we consider how much the greatness of their birth, their interest, and their riches, had puffed up their minds; if we reflect on the ill company they fell into, and the many opportunities they had of debauching themselves, can we be surprised that, after they had been so long absent from Socrates, they arrived at length to that height of insolence to which they have been seen to arise?
If they have been guilty of crimes, the accuser will load Socrates with them, and not allow him to be worthy of praise, for having kept them within the bounds of their duty during their youth, when, in all appearance, they would have been the most disorderly and least governable.

This, however, is not the way we judge of other things; for whoever pretended that a musician, a player on the lute, or any other person that teaches, after he has made a good scholar, ought to be blamed for his growing more ignorant under the care of another master?
If a young man gets an acquaintance that brings him into debauchery, ought his father to lay the blame on the first friends of his son among whom he always lived virtuously?
Is it not true, on the contrary, that the more he finds that this last friendship proves destructive to him, the more reason he will have to praise his former acquaintance.

And are the fathers themselves, who are daily with their children, guilty of their faults, if they give them no ill example?
Thus they ought to have judged of Socrates; if he led an ill life, it was reasonable to esteem him vicious; but if a good, was it just to accuse him of crimes of which he was innocent?
And yet he might have given his adversaries ground to accuse him, had he but approved, or seemed to approve those vices in others, from which he kept himself free: but Socrates abhorred vice, not only in himself, but in everyone besides.

To prove which, I need only relate his conduct toward Critias, a man extremely addicted to debauchery.

Socrates perceiving that this man had an unnatural passion for Euthydemus, and that the violence of it would precipitate him so far a length as to make him transgress the bounds of nature, shocked at his behaviour, he exerted his utmost strength of reason and argument to dissuade him from so wild a desire.