Your worst enemy cannot harm you as much as your own thoughts, unguarded.

The noblest kind of retribution is not to become like your enemy.

At the bottom of enmity between strangers lies indifference.

To think ill of mankind, and not wish ill to them, is perhaps the highest wisdom and virtue.

Nationalism is an infantile disease, the measles of mankind.

By nature, men are nearly alike; by practice, they get to be wide apart.

I am a man: I consider nothing human alien to me.

Do not do unto others as you would that they should do unto you. Their tastes may not be the same.

If you wish to avoid foreign collision, you had better abandon the ocean.

In settling an island, the first building erected by a Spaniard will be a church, by a Frenchman a fort, by a Dutchman a warehouse, and by an Englishman an alehouse.

This is not a clash between civilizations. It is a clash about civilization.

A criminal may improve and become a decent member of society. A foreigner cannot improve. Once a foreigner, always a foreigner. There is no way out for him.