Nothing is as dangerous as an ignorant friend; a wise enemy is to be preferred.

Everyone calls himself a friend, but only a fool relies on it; nothing is commoner than the name, nothing rarer than the thing.

People who make no noise are dangerous.

Death never takes the wise man by surprise, he is always ready to go.

It is dangerous to be America's enemy, but fatal to be America's friend.

A friend is nothing but a known enemy.