Marcus Aurelius: “Attend to the matter which is before thee, whether it is an opinion or an act or a word.”

Thou must turn to profit the present by the aid of reason and justice.

He took a reasonable care of his body's health, not as one who was greatly attached to life, nor out of regard to personal appearance, nor yet in a careless way, but so that through his own attention he very seldom stood in need of the…

And the things which conduce in any way to the commodity of life, and of which fortune gives an abundant supply, he used without arrogance and without excusing himself; so that when he had them, he enjoyed them without affectation, and…

One is that things do not touch the soul, for they are external and remain immovable; but our perturbations come only from the opinion which is within.