CELSUS.
Of the life of Celsus nothing is known; but he was an older contemporary of Columella. Colum. iii. 17, 4, ‘Iulius Atticus et Cornelius Celsus, aetatis nostrae celeberrimi auctores, patrem atque filium Sasernam secuti.’
He wrote an encyclopaedic work on agriculture, medicine, war, rhetoric, and philosophy, but only the section on medicine is extant.
Quint. xi. 12, 24, ‘Cum etiam Cornelius Celsus, mediocri vir ingenio, non solum de his omnibus conscripserit artibus sed amplius rei militaris et rusticae et medicinae praecepta reliquerit.’
The first part consisted of five books on agriculture: cf. Colum. i. 1, 14, ‘Cornelius totum corpus disciplinae quinque libris complexus est.’ This section of the work was probably written in the reign of Tiberius, for it was known to Iulius Graecinus, whose execution took place under Caligula. Plin. N.H. xiv. 33, ‘Graecinus, qui alioqui Cornelium Celsum transcripsit.’
There are eight books De Re Medica. The only indication of their date is in iv. 7, where Celsus mentions a prescription as not found ‘in monumentis medicorum.’ As this prescription is given by Scribonius Largus, who wrote about A.D. 47, Celsus must have written before that year.
The section on war was used by Vegetius (De Re Mil. i. 8).
Rhetoric was also treated in the encyclopaedia. Quintilian, who mentions him as one of the more careful writers on that subject (iii. 1, 21, ‘accuratius scripsit Celsus’), frequently combats his opinions and speaks of him rather contemptuously: e.g. ix. 1, 18, ‘Cornelius Celsus nimia profecto novitatis cupidine ductus. Nam quis ignorasse eruditum alioqui virum credat,’ etc. He may be the Celsus of Juv. 6, 245, who (according to the Scholiast) wrote a manual of rhetoric in seven books.
There were also six books on the history of philosophy. Augustine de haeres. prol., ‘Opiniones omnium philosophorum qui sectas varias condiderunt usque ad tempora sua vi. non parvis voluminibus quidam Celsus absolvit; nec redarguit aliquem, sed tantum quid sentirent aperuit. Cum ferme centum philosophos nominasset,’ etc.
Celsus also wrote separate treatises (1) on philosophy, Quint. x. 1, 24, ‘Scripsit non parum multa Cornelius Celsus, Sextios secutus, non sine cultu ac nitore’; (2) on strategy (Lydus de mag. i. 47).