He who is himself crossed in love is able from time to time to master his passion, for he is not the creature but the creator of his own misery; and if a lover is unable to control his passion, he at least knows that he is himself to blame for his sufferings. But he who is loved without reciprocating that love is lost beyond redemption, for it is not in his power to set a limit to that other's passion, to keep it within bounds, and the strongest will is reduced to impotence in the face of another's desire.
"Beware of Pity". Book by Stefan Zweig, 1939.