Marcus Aurelius
Meditations 8.5
This is the chief thing: Be not perturbed, for all things are according to the nature of the universal; and in a little time thou wilt be nobody and nowhere, like Hadrianus and Augustus. In the next place, having fixed thy eyes steadily on thy business, look at it, and at the same time remembering that it is thy duty to be a good man, and what man's nature demands, do that without turning aside; and speak as it seems to thee most just, only let it be with a good disposition and with modesty and without hypocrisy.
Marcus Aurelius, Meditations 8.5, translated by George Long
Firstly, fret not thyself, for all things are as the Nature of the Universe would have them, and within a little thou shalt be non-existent, and nowhere, like Hadrianus and Augustus. Secondly, look steadfastly at the thing, and see it as it is and, remembering withal that thou must be a good man, and what the Nature of man calls for, do this without swerving, and speak as seemeth to thee most just, only be it graciously, modestly, and without feigning.
Marcus Aurelius, Meditations 8.5, translated by C. R. Haines