"Let no one when young delay to study philosophy, nor when old grow weary of studying it. For no one is either too early or too late for the health of the soul."

"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."

"A free man cannot acquire many possessions, because this is not an easy thing to do without at the same time becoming a slave to mobs or kings."

"The man who says that all things happen of necessity cannot criticize one who says that not all things happen of necessity. For he admits that the very statement he is making is made of necessity."

"The greatest disturbance of the soul is not pain, but the fear of pain."