Aurelius, Meditations §aur_07_xii: Whatsoever any man either doth or saith, thou must be good; not for any man's...

Whatsoever any man either doth or saith, thou must be good; not for any man's sake, but for thine own nature's sake; as if either gold, or the emerald, or purple, should ever be saying to themselves, Whatsoever any man either doth or saith, I must still be an emerald, and I must keep my colour.