Do every act of your life as though it were the very last ac... - Marcus Aurelius, Meditations

"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."

"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."

"The soul becomes dyed with the colour of its thoughts."

"Very little is needed to make a happy life; it is all within yourself in your way of thinking."

"Don't go on discussing what a good person should be. Just be one."