Arethas of Caesarea

Arethas of Caesarea (Greek: Ἀρέθας; born c. 860 AD) was Archbishop of Caesarea in Cappadocia (modern Kayseri, Turkey) early in the 10th century, and is considered one of the most scholarly theologians of the Greek Orthodox Church. The codices produced by him, containing his commentaries are credited with preserving many ancient texts, including those of Plato and Marcus Aurelius' "Meditations".

He was born at Patrae (modern-day Greece). He was a disciple of Photius. He studied at the University of Constantinople. He became Deacon of Patrea around 900 and was made Archbishop of Caesarea by Nikolas of Constantinople in 903. He was deeply involved in court politics and was a principle actor in the controversy over the scandal created when Emperor Leo VI attempted to marry a fourth time after his first three wives had died and left him without an heir. Despite Arethas' fame as a scholar, Jenkins thinks little of him as a person. When recounting the details of the scandal, Arethas is described as "...narrow-minded, bad-hearted... morbidly ambitious and absolutely unscrupulous..."

Arethas' comment on Lucian of Samosata from Harley MS 5694, mentioning the Meditations by Marcus Aurelius. His are the earliest direct references to the work.

He is the compiler of a Greek commentary (scholia) on the Apocalypse, for which he made considerable use of the similar work of his predecessor, Andrew of Caesarea. It was first printed in 1535 as an appendix to the works of Oecumenius. Ehrhard inclines to the opinion that he wrote other scriptural commentaries. To his interest in the earliest Christian literature, caught perhaps from the above-named Andrew, we owe the Arethas Codex, through which the texts of almost all of the ante-Nicene Greek Christian apologists have, in great measure, reached us.

He is also known as a commentator of Plato and Lucian; the famous manuscript of Plato (Codex Clarkianus), taken from Patmos to London, was copied by order of Arethas. Other important Greek manuscripts, e.g. of Euclid, the rhetor Aristides, and perhaps of Dio Chrysostom, are owing to him. Not a few of his minor writings, contained in a Moscow manuscript, are said still to await an editor. Krumbacher emphasizes his fondness for ancient classical Greek literature and the original sources of Christian theology, in spite of the fact that he lived in a "dark" century, and was far away from any of the few remaining centers of erudition.

Arethas' works also contain the oldest known references to the Meditations (written c. 175 AD) by the Roman emperor Marcus Aurelius. Arethas admits to holding the work in high regard in letters to the Byzantine emperor Leo VI the Wise and in his comments to Lucian and Dio Chrysostom'. Arethas is credited with reintroducing the Meditations to public discourse.