The New International Encyclopædia/Ariston

ARIS′TON (Gk. Άριστομένης), or ARIS′TO of Chios (?-c. 250 B.C.). A disciple of Zeno, and afterward, according to Diogenes Laërtius, of the Platonist Polemo. Though a professed Stoic, he differed from Zeno in that he rejected all branches of philosophy except ethics; maintained that the supreme good consisted in άδιαΦορια, adiaphoria, or entire indifference to everything except virtue and vice; recognized only one virtue, which he called άδιαΦορια, hygeia, or health of soul, and doubted the existence of God. Ariston was called Siren, from his eloquence, and Phalantus, from his baldness.