"It is impossible for someone to dispel his fears about the most important matters if he does not understand the nature of the universe but still gives some credence to myths. So that without the study…"

"We are born once and cannot be born twice, but for all eternity must be no more. But you, who are not master of tomorrow, postpone your happiness. Life is wasted by delaying, and each one of us dies w…"

"When we are young, we should not hesitate to philosophize, and when we are old, we should not grow tired of philosophizing. For no one is too young or too old to attain health of the soul."

"Justice is a contract of utility entered into to prevent men from harming or being harmed by one another."

"He who has peace of mind has no need of wealth."