Happiness is not a reward — it is a consequence. Suffering is not a punishment — it is a result.

Robert Green Ingersoll (1833–1899) American lawyer, freethinker, orator

Essay (1881-11) “The Christian Religion,” “Part 2” North American Review, Vol. 133, No. 300
    (Source)

See Lippmann (1929). Collected in Allen Thorndike Rice (ed.), The Christian Religion, ch. 3 (1882).