“The recipe for perpetual ignorance is: Be satisfied with your opinions and content with your knowledge.”

“He who does not understand your silence will probably not understand your words.”

“Never explain―your friends do not need it and your enemies will not believe you anyway.”

“When you grow suspicious of a person and begin a system of espionage upon him, your punishment will be that you will find your suspicions true.”

“Life is a checkerboard, and the player opposite you is time. If you hesitate before moving, or neglect to move promptly, your men will be wiped off the board by time. You are playing against a partner who will not tolerate indecision!”

“The teacher is the one who gets the most out of the lessons, and the true teacher is the learner.”

“The best way to prepare for life is to begin to live.”