Marcus Aurelius: “In contemplating thyself never include the vessel which surrounds thee and these instruments which are attached about…”

Further, he was not fond of change nor unsteady, but he loved to stay in the same places, and to employ himself about the same things; and after his paroxysms of headache he came immediately fresh and vigorous to his usual occupations.

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

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

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