Meditations by Marcus Aurelius Book 3 Page 13

For it is not lawful, that anything that is of another and inferior kind and nature, be it what it will, as either popular applause, or honour, or riches, or pleasures; should be suffered to confront and contest as it were, with that which is rational, and operatively good. For all these things, if once though but for a while, they begin to please, they presently prevail, and pervert a man’s mind, or turn a man from the right way. Do thou therefore I say absolutely and freely make choice of that which is best, and stick unto it. Now, that they say is best, which is most profitable. If they mean profitable to man as he is a rational man, stand thou to it, and maintain it; but if they mean profitable, as he is a creature, only reject it; and from this thy tenet and conclusion keep off carefully all plausible shows and colours of external appearance,