Marcus Aurelius
Meditations 12.4
I have often wondered how it is that every man loves himself more than all the rest of men, but yet sets less value on his own opinion of himself than on the opinion of others. If then a god or a wise teacher should present himself to a man and bid him to think of nothing and to design nothing which he would not express as soon as he conceived it, he could not endure it even for a single day. So much more respect have we to what our neighbors shall think of us than to what we shall think of ourselves.
Marcus Aurelius, Meditations 12.4, translated by George Long
Often have I marvelled how each one of us loves himself above all men, yet sets less store by his own opinion of himself than by that of everyone else. At any rate, if a God or some wise teacher should come to a man and charge him to admit no thought or design into his mind that he could not utter aloud as soon as conceived, he could not endure this ordinance for a single day. So it is clear that we pay more deference to the opinion our neighbours will have of us than to our own.
Marcus Aurelius, Meditations 12.4, translated by C. R. Haines