"If someone can prove me wrong and show me my mistake in any thought or action, I shall gladly change. I seek the truth, which never harmed anyone: the harm is to persist in one's own self-deception and ignorance."
"You are a little soul carrying about a corpse, as Epictetus used to say."
"The soul becomes dyed with the colour of its thoughts."
"Never let the future disturb you. You will meet it, if you have to, with the same weapons of reason which today arm you against the present."
"Dwell on the beauty of life. Watch the stars, and see yourself running with them."
"You have power over your mind - not outside events. Realize this, and you will find strength."