Meditations by Marcus Aurelius Book 7 Page 31

ever changing and soon changed themselves) let it be thine only care and study, how to make a right use of all such accidents. For there is good use to be made of them, and they will prove fit matter for thee to work upon, if it shall be both thy care and thy desire, that whatsoever thou doest, thou thyself mayst like and approve thyself for it.

And both these, see, that thou remember well, according as the diversity of the matter of the action that thou art about shall require. Look within; within is the fountain of all good. Such a fountain, where springing waters can never fail, so thou dig still deeper and deeper.

XXXII. Thou must use thyself also to keep thy body fixed and steady; free from all loose fluctuant either motion, or posture. And as upon thy face and looks, thy mind