Quote by Paul-Henri Thiry Holbach
"We are happiest when we are useful, and we are most useful when we think clearly."
More from Paul-Henri Thiry Holbach
"Man is unhappy because he does not know he is happy; it is only that which makes him unhappy."
"All religions are founded on fables and mysteries; and it is impossible that we should ever be tolerably happy."
"Theology is the effort to explain the unknowable in terms of the not worth knowing."
"Man's life is a line between the nothing from which it comes and the nothing into which it goes."