Although in some sense he was a pupil of Plato, he also studied with Aristotle and with Speusippus who was Plato 's successor as head of the Academy .
Kahit na sa ilang-unawa siya ay isang mag-aaral ng Plato, siya din ang aral sa Aristotle at sa Speusippus na Plato 's kapalit bilang pinuno ng Academy.