Epictetus, Golden Sayings 32

What then is the chastisement of those who accept it not? To be as they are.

Is anyone discontented with being alone? Let him be in solitude. Is anyone discontented with his parents? Let him be a bad son, and lament. Is anyone discontented with his children? Let him be a bad father.

"Throw him into prison!" What prison? Where he is already, for he is there against his will, and wherever a man is against his will, that to him is a prison.

Thus Socrates was not in prison, since he was there with his own consent.