Cleanthes, a Stoic philosopher, born at Assos, in Troas, of the 3rd century B.C.; wrought as a drawer of water by night that he might earn his fee as pupil of Zeno's by day; became Zeno's successor and the head of his school; regarded "pleasure as a remission of that moral energy of the soul, which alone is happiness, as an interruption to life, and as an evil, which was not in accordance with nature, and no end of nature."