The world is nothing but change, our life is only perception.
The noblest kind of retribution is not to become like your enemy.
It's silly to try to escape other people's faults. They are inescapable. Just try to escape your own.
One whose chief regard is for his own mind, and for the divinity within him and the service of its goodness, will strike no poses, utter no complaints, and crave neither for solitude nor yet for a crowd. Best of all, his life will be free from continual pursuing and avoiding.
Both happiness and unhappiness depend on perception
The happiness and unhappiness of the rational, social animal depends not on what he feels but on what he does; just as his virtue and vice consist not in feeling but in doing.