De Viris Illustribus (Illustrious Men)

Theodorus, afterwards called Gregory, bishop of Neocæsarea in Pontus, while yet a very young man, in company with his brother Athenodorus, went from Cappadocia to Berytus, and thence to Cæsarea in Palestine, to study Greek and Latin literature. When Origen had seen the remarkable natural ability of these men, he urged them to study philosophy, in the teaching of which he gradually introduced the matter of faith in Christ, and made them also his followers. So, instructed by him for five years, they were sent back by him to their mother. Theodorus, on his departure, wrote a panegyric of thanks to Origen, and delivered it before a large assembly, Origen himself being present. This panegyric is extant at the present day.

He wrote also a short, but very valuable, paraphrase On Ecclesiastes, and current report speaks of other epistles of his, but more especially of the signs and wonders, which as bishop, he performed to the great glory of the churches.