Abstract

This paper traces the philosophical sources of one of the central Christian doctrines concerning deity-the doctrine of the Trinity - from the classical Greek period through to Justin Martyr (114¬ 165 C.E.). A key figure in this continuous line of thought is the Greek Middle Platonic philosopher Numenius of Apamea (fl. ca 150 C.EJ, who followed the Platonic tradition of Xenocrates of Chalcedon (d. 314 B.C.E.).