This is the chief thing: be not perturbed, for all things are according to the nature of the universal.

The intelligence of the universe is social.

Retire into thyself. The rational principle which rules has this nature, that it is content with itself when it does what is just, and so secures tranquility.

The best revenge is not to be like your enemy.

Most of what we say and do is not essential. If you can eliminate it, you'll have more time, and more tranquillity. Ask yourself at every moment, 'Is this necessary?'

The sinner sins against himself; the wrongdoer wrongs himself, becoming the worse by his own action.

Constantly regard the universe as one living being, having one substance and one soul; and observe how all things have reference to one perception, the perception of this one living being; and how all things act with one movement; and how all things are the cooperating causes of all things which exist; observe too the continuous spinning of the thread and the contexture of the web.