 Epicurean moral theory is the most prominent hedonistic theory in the ancient world. While Epicurus holds that pleasure is the sole intrinsic good and pain is what is intrinsically bad for humans, he is also very careful about defining these two. Aware of the Cyrenaics who hold that pleasures, moral and immoral, are the end or goal of all action, Epicurus presents a sustained argument that pleasure, correctly understood, will coincide with virtue.