More quotes by Marcus Aurelius, Meditations

"Perfection of character is this: to live each day as if it were your last, without frenzy, without apathy, without pretence."
"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."
"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."
"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."