4 Let me now run through the list of our own writers. Did not Quadratus a disciple of the apostles and bishop of the Athenian church deliver to the Emperor Hadrian (on the occasion of his visit to the Eleusinian mysteries) a treatise in defence of our religion. And so great was the admiration caused in everyone by his eminent ability that it stilled a most severe persecution. The philosopher Aristides, a man of great eloquence, presented to the same Emperor an apology for the Christians composed of extracts from philosophic writers.
His example was afterwards followed by Justin another philosopher who delivered to Antoninus Pius and his sons and to the senate a treatise Against the Gentiles, in which he defended the ignominy of the cross and preached the resurrection of Christ with all freedom. Need I speak of Melito bishop of Sardis, of Apollinaris chief-priest of the Church of Hierapolis, of Dionysius bishop of the Corinthians, of Tatian, of Bardesanes, of Irenæus successor to the martyr Pothinus; all of whom have in many volumes explained the uprisings of the several heresies and tracked them back, each to the philosophic source from which it flows.
Pantænus, a philosopher of the Stoic school, was on account of his great reputation for learning sent by Demetrius bishop of Alexandria to India, to preach Christ to the Brahmans and philosophers there. Clement, a presbyter of Alexandria, in my judgment the most learned of men, wrote eight books of Miscellanies and as many of Outline Sketches, a treatise against the Gentiles, and three volumes called the Pedagogue. Is there any want of learning in these, or are they not rather drawn from the very heart of philosophy?
Imitating his example Origen wrote ten books of Miscellanies, in which he compares together the opinions held respectively by Christians and by philosophers, and confirms all the dogmas of our religion by quotations from Plato and Aristotle, from Numenius and Cornutus. Miltiades also wrote an excellent treatise against the Gentiles. Moreover Hippolytus and a Roman senator named Apollonius have each compiled apologetic works. The books of Julius Africanus who wrote a history of his own times are still extant, as also are those of Theodore who was afterwards called Gregory, a man endowed with apostolic miracles as well as with apostolic virtues.
We still have the works of Dionysius bishop of Alexandria, of Anatolius chief priest of the church of Laodicea, of the presbyters Pamphilus, Pierius, Lucian, Malchion; of Eusebius bishop of Cæsarea, Eustathius of Antioch and Athanasius of Alexandria; of Eusebius of Emisa, of Triphyllius of Cyprus, of Asterius of Scythopolis, of the confessor Serapion, of Titus bishop of Bostra; and of the Cappadocians Basil, Gregory, and Amphilochius. All these writers so frequently interweave in their books the doctrines and maxims of the philosophers that you might easily be at a loss which to admire most, their secular erudition or their knowledge of the scriptures.
Source: Letters (New Advent)