Aristotle, Nicomachean Ethics
H. Rackham, Ed.

If the former alternative is possible, that is, if it may be the giver and not the receiver of too large a share who acts unjustly, then when a man knowingly and voluntarily assigns a larger share to another than to himself— as modest people are thought to do, for an equitable man is apt to take less than his due—this is a case of acting unjustly towards oneself. But perhaps this also requires qualification. For the man who gave himself the smaller share may possibly have got a larger share of some other good thing, for instance glory, or intrinsic moral nobility. Also the inference may be refuted by referring to our definition of acting unjustly: in the case supposed, the distributor has nothing done to him against his wish; therefore he does not suffer injustice merely because he gets the smaller share: at most he only suffers damage.