A man may learn wisdom even from a foe.

Meton (astronomer in 5th century BC): With the straight ruler I set to work To make the circle four-cornered .

Even if you persuade me, you won’t persuade me.

Chorus of women: [...] Oh! my good, gallant Lysistrata, and all my friends, be ever like a bundle of nettles; never let you anger slacken; the wind of fortune blown our way.

Weak mortals, chained to the earth, creatures of clay as frail as the foliage of the woods, you unfortunate race, whose life is but darkness, as unreal as a shadow, the illusion of a dream.

To win the people, always cook them some savoury that pleases them.

You're mistaken; men of sense often learn much from their enemies. Prudence is the best safeguard. This principle cannot be learnt from a friend: but an enemy extorts it immediately. It is from their foes and not their friends, that cities learn the lesson of building high walls and ships of war. And this lesson saves their children, their homes, and their properties.