One should guard against preaching to the young man success in the customary sense as the aim of life. For a successful man is he who receives a great deal from this fellowmen, usually incomparably more than corresponds to his service to them. The value of a man, however, should be seen what he gives. and not in what he is able to receive.

Albert Einstein (1879-1955) German-American physicist

Speech (1936-10-15), Convocation of University of New York, Albany [tr. Arronet]
    (Source)

Collected in "On Education" (1936), Out of My Later Years, ch. 9 (1950).