Origen urges Gregory to use his secular learning, particularly philosophy, in the service of Christianity, after the figure of the Israelites spoiling the Egyptians for treasures which they later transformed into sacred furnishings and vessels for the service of the living God. F. Crombie translation, from Ante-Nicene Fathers, vol. 4, American edition.

Allan Menzies translation, from the Ante-Nicene Fathers, vol. 10 (original supplement to the American edition). Same letter as translated in vol. 4 by F. Crombie.

Crombie-Cairns translation, from the Ante-Nicene Fathers, vol. 4, American edition. Each of eight books in its own HTML file, with notes and links to previous, next, table of contents.

Against Celsus, and De Principiis. Available in several formats, with one file for each book of the two works. Some scanner errors.

Against Celsus, and De Principiis, with each book of the two works in its own file. Some scanner errors.

Compilation of Celsus' pleas against the Christians, according to Origen, sorted out by topics.

Examines Celsus' arguments against the Christians, stated in his book Alethes Logos, along with Origen's outlook on philosophy and the pagan world.

Compilation of Celsus' pleas against the Christians, arranged by book and chapter in Origen's work 'Contra Celsum'.

Origen's translator Rufinus announces his decision not to set down in his translation objectionable passages, but to pass them over as not genuine but inserted by others.