There are minds so impatient of inferiority that their gratitude is a species of revenge, and they return benefits, not because recompense is a pleasure, but because obligation is a pain.
(Samuel Johnson (1709-1784), British author, lexicographer. repr. in Works of Samuel Johnson, Yale Edition, vol. 4, eds. W.J. Bate and Albrecht B. Strauss (1969). quoted in Rambler (Jan. 15, 1751), no. 87.)
Pain is as diverse as man. One suffers as one can.
(Victor Hugo (1802-1885), French poet, novelist, playwright, essayist. Trans. by Lorenzo O'Rourke. "Thoughts," Postscriptum de ma vie, in Victor Hugo's Intellectual Autobiography, Funk and Wagnalls (1907).)