Epictetus — "What does not transmit light creates darkness."

"When you are going to meet with any person, and particularly one of those who are considered to be in a superior condition, represent to yourself what Socrates or Zeno would have done in such circumst…"

"It is impossible for a man to begin to learn what he thinks he already knows."

"Never say about anything, 'I have lost it,' but only 'I have given it back.' Is your child dead? It is given back. Is your wife dead? She is given back. Is your estate taken from you? Is not this also…"

"Freedom is not procured by a full enjoyment of what is desired, but by controlling the desire."

"Don't be surprised if those outside are always talking against you and making jokes about you."