For so the goblin Selfishness would reward the angel Love.
George MacDonald, Phantastes, p. 124,
1981 edition, 1851 original.

George MacDonald, a contemporary of Lewis Carroll, was a masterful
writer who poetically described human nature. His books have not been widely
read in the last few years but are certainly worthy of consideration. In
Phantastes, he wrestles with the concepts of love, lust, pride, and
disobedience in ways which challenge every reader to consider their own
motives. In this quote, he is asking us to consider what it is that 
constitutes love and what constitutes self-interest.