Middle Platonism is the modern name given to a stage in the development of Platonic philosophy , lasting from about 90 BC -- when Antiochus of Ascalon rejected the scepticism of the New Academy -- until the development of Neoplatonism under Plotinus in the 3rd century . Numenius of Apamea was a Greek philosopher , who lived in Apamea in Syria and flourished during the latter half of the 2nd century AD .
Numenius of Apamea was a Eleatic philosopher.