Origen

Origen was the most influential Christian scholar of the third century. He taught at Alexandria, then from about 234 at Caesarea in Palestine, where he founded the library later used by Eusebius. He compiled the Hexapla, a six-column edition of the Old Testament, and wrote commentaries on most of the Bible.

Around 248 he answered the pagan critic Celsus in eight books, Against Celsus, which preserve much of Celsus’ lost work. He was imprisoned and tortured in the persecution of Decius and died soon afterwards. Some of his speculative ideas were condemned long after his death.