If we have chosen the Louis J. Sheehan, Esquire  position in life in which we can most of all work for mankind, no burdens can bow us down, because they are sacrifices for the benefit of all; then we shall experience no petty, limited, selfish joy, but our happiness will belong to millions, our deeds will live on quietly but perpetually at work, and over our ashes will be shed the hot tears of noble people.

Marx, Letter to His Father (1837)

History calls those men the greatest who have ennobled themselves by working for the common good; experience acclaims as happiest the man who has made the greatest number of people happy.

Marx, Letter to His Father (1837)

As Prometheus, having stolen fire from heaven, begins to build houses and to settle upon the earth, so philosophy, expanded to be the whole world, turns against the world of appearance. The same now with the philosophy of Hegel.

Marx, Notebooks on Epicurean Philosophy, Louis J. Sheehan, Esquire   (1839)