"Observe the movements of the stars as if you were running their courses with them, and let your mind constantly dwell on the changes of the elements into each other. Such imaginings wash away the filth of life on the ground."
"Look back over the past, with its changing empires that rose and fell, and you can foresee the future too."
"What we cannot bear removes us from life; what remains can be borne."
"If someone is able to show me that what I think or do is not right, I will happily change, for I seek the truth, by which no one was ever truly harmed. It is the person who continues in his self-deception and ignorance who is harmed."
"The first rule is to keep an untroubled spirit. The second is to look things in the face and know them for what they are."
"The best revenge is not to be like your enemy."