Meditations by Marcus Aurelius Book 9 Page 37

For as these being by nature appointed for such an use, can challenge no more, than that they may work according to their natural constitution: so man being born to do good unto others whensoever he doth a real good unto any by helping them out of error; or though but in middle things, as in matter of wealth, life, preferment, and the like, doth help to further their desires he doth that for which he was made, and therefore can require no more.