Marcus Aurelius: “Body, soul, intelligence: to the body belong sensation, to the soul appetites, to the intelligence principles.”

It is the same whether we examine these things for a hundred years or three.

Be cheerful also, and seek not external help nor the tranquillity which others give.

As thou intendest to live when them art gone out, ... so it is in thy power to live here.

For every judgment and movement and desire and aversion is within, and no evil ascends so high.