Epicurus Identified Good with Pleasure and Evil with Pain

Epicurus identified good with pleasure and evil with pain. This doctrine (repeated later in Bentham) is called "hedonism" (from the Greek word for pleasure). However, contrary to popular opinion, Epicurus was not proposing what "Epicureanism" sometimes has been taken to mean: a sensuous, profligate life. He believed that the true life of pleasure consists in an attitude of imperturbable emotional calm that needs only simple pleasures, a good diet, health, a prudent moral life, and good friends. Only good or bad sensations (pleasure or pain, respectively) should concern us, and death is not a sensation, so we should not fear death.
-Epicurus cherished friendship above all.