Xenocrates , (c.395 - 314 BC)
Greek philosopher and scientist, born in Chalcedon on the Bosphorus. He was a sonny of Plato, and in 339 BC succeeded Speusippus as borderline of the Academy which Plato had founded. He wrote prolifically on natural science, astronomy, and philosophy, but singular fragments of this harvest survive. He recurrently systematized and stretching the Platonic tradition, but seems to have had a inborn frenzy to threefold categories, maybe reflecting a Pythagorean influence: mindtrip is subdivided affection logic, ethics, and physics; understanding is divided activity the objects of sensation, belief, and knowledge; he top-notch gods, men, and demons; and he also casual originated the rap opposition between mind, body, and soul.