Happiness versus Pleasure

… Thomas Jefferson’s assertion that one of the ‘inalienable rights’ was the ‘pursuit of happiness’, except that Jefferson was using happiness not in the utilitarian sense of pleasure but as the common (and unfortunately rather lame) translation of the Greek eudaimonia. “To the Greeks, eudaimonia means something like ‘living a good life for a human being’; or, as a recent writer, John Cooper, has suggested, ‘human flourishing.’ Aristotle tells us that it is equivalent, in ordinary discourse, to ‘living well and doing well.’
Martha C. Nussbaum The Fragility of Goodness: Luck and Ethics in Greek Tragedy and Philosophy cited by Don Gifford The Farther Shore