Men of sense often learn from their enemies. It is from their foes, not their friends, that cities learn the lesson of building high walls and ships of war.

The old are in a second childhood.

Youth ages, immaturity is outgrown, ignorance can be educated, and drunkenness sobered, but stupid lasts forever.

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

First listen, my friend, and then you may shriek and bluster.

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.

Love is merely the name for the desire and pursuit of the whole.