It is his nature to confer benefits, but he is ashamed to receive them; for the former is the part of a superior, the latter of an inferior. And when he has received a benefit, he is apt to confer a greater in return; for thus his creditor will become his debtor and be in the position of a recipient of his favour.
It seems, moreover, that such men remember the benefits which they have conferred better than those which they have received (for the recipient of a benefit is inferior to the benefactor, but such a man wishes to be in the position of a superior), and that they like to be reminded of the one, but dislike to be reminded of the other; and this is the reason why we read 82 that Thetis would not mention to Zeus the services she had done him, and why the Lacedaemonians, in treating with the Athenians, reminded them of the benefits received by Sparta rather than of those conferred by her.