"Excellence is never an accident. It is always the result of high intention, sincere effort, and intelligent execution; it represents the wise choice of many alternatives - choice, not chance, determines your destiny."
"He who hath many friends hath none."
"To write well, express yourself like the common people, but think like a wise man."
"I have gained this by philosophy … I do without being ordered what some are constrained to do by their fear of the law."
"Knowing yourself is the beginning of all wisdom."
"I count him braver who overcomes his desires than him who overcomes his enemies."