"Never interrupt your enemy when he is making a mistake."
"If you want to make peace; you don't talk to your friends. You talk to your enemies. "
"Forgive your enemies; but never forget their names."
"Never explain--your friends do not need it and your enemies will not believe you anyway."
"He hasn't an enemy in the world - but all his friends hate him."
"A wise man gets more use from his enemies than a fool from his friends."
"Observe your enemies; for they first find out your faults. "
"Above all things; never be afraid. The enemy who forces you to retreat is himself afraid of you at that very moment. "
"Education's purpose is to replace an empty mind with an open one."
"Education is a method whereby one acquires a higher grade of prejudices."