“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.”

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

“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!”

“If you can not answer a man's argument, all is not lost; you can still call him vile names.”

“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.”

“Self-discipline is the ability to make yourself do what you should do, when you should do it, whether you feel like it or not.”