Quotes by Subject:

Punishment

It is as expedient that a wicked man be punished as that a sick man be cured by a physician; for all chastisement is a kind of medicine. - Plato.

The punishment which the wise suffer who refuse to take part in the government, is to live under the government of worse men. - Plato.

The generality of men are naturally apt to be swayed by fear rather than reverence, and to refrain from evil rather because of the punishment that it brings than because of its own foulness. – Aristotle.