Tomorrow is nothing, today is too late; the good lived yesterday.

No one can keep you from living as your nature requires. Nothings can happen to you that is not required by Nature.

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.

Either an ordered Universe or a medley heaped together mechanically but still an order; or can order subsist in you and disorder in the Whole! And that, too, when all things are so distinguished and yet intermingled and sympathetic.

Enough of this wretched life and murmuring and apish tricks. Why art thou disturbed? What is there new in this? What unsettles thee? Is it the form of the thing? Look at it. Or is it the matter? Look at it. But besides these there is nothing. Towards the gods, then, now become at last more simple and better. It is the same whether we examine these things for a hundred years or three.

Consider when thou art much vexed or grieved, that man's life is only a moment, and after a short time we are all laid out dead.

It is in your power to withdraw yourself whenever you desire. Perfect tranquility within consists in the good ordering of the mind, the realm of your own.