Both are distinguished for their opposition to magical arts.

The Celsus of the Pseudomantis is a friend of Lucian, and it is precisely from a friend of Lucian that the 'Word of Truth' replied to by Origen might be supposed to have come.

Lastly, time and place both support the identification.

The Celsus of Lucian lived under Marcus Aurelius and Commodus, and Dr.Keim decides, after an elaborate examination of the internal evidence, that the Celsus of Origen wrote his work in the year 178 A.D., towards the close of the reign of Marcus Aurelius.
Such is Dr.Keim's view.

In the date assigned to the [Greek: Logos alaethaes] it does not differ materially from that of the large majority of critics.