The whole, then, consists in this--that you should have command over yourself.

I have already told you what kind of command this is; and by considering what is most consistent with patience, fortitude, and greatness of soul, a man not only restrains himself, but, somehow or other, mitigates even pain itself.
XXIII.

Even as in a battle the dastardly and timorous soldier throws away his shield on the first appearance of an enemy, and runs as fast as he can, and on that account loses his life sometimes, though he has never received even one wound, when he who stands his ground has nothing of the sort happen to him, so they who cannot bear the appearance of pain throw themselves away, and give themselves up to affliction and dismay.

But they that oppose it, often come off more than a match for it.

For the body has a certain resemblance to the soul: as burdens are more easily borne the more the body is exerted, while they crush us if we give way, so the soul by exerting itself resists the whole weight that would oppress it; but if it yields, it is so pressed that it cannot support itself.