Vanity, trying to arouse a good opinion of oneself, and even to try to believe in it, seems, to the noble man, such bad taste, so self-disrespectful, so grotesquely unreasonable, that he would like to consider vanity a rarity. He will say, "I may be mistaken about my value, but nevertheless demand that I be valued as I value myself", but this is not vanity. The man of noble character must learn that in all social strata in any way dependent, the ordinary man has only ever valued himself as his master dictates (it is the peculiar right of masters to create values). It may be looked upon as an extraordinary atavism that the ordinary man is always waiting for an opinion about himself and then instinctively submitting to it; not only to a "good" opinion, but also to a bad and unjust one (think of all the self-depreciations which the believing Christian learns from his Church). It is "the slave" in the vain man's blood- and how much of the "slave" is still left in woman- which seeks to seduce to good opinions of itself; it is the slave, too, who immediately afterwards falls prostrate himself before these opinions, as though he had not called them forth. Vanity is an atavism.
— Nietzsche, Beyond Good and Evil
(Yes, I know Nietzsche was a misogynist asshole. But his point is still fundamentally sound.)
[h/t to lenin]