“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.” 

― Marcus Aurelius, Meditations

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

― Marcus Aurelius, Meditations