Calcidius (C. 4Th Century AD) the Platonist Calcidius (Sometimes Less Correctly Spelt Chalcidius) Was the Author of a Latin Work Containing A

Calcidius (c. 4th century AD) The Platonist Calcidius (sometimes less correctly spelt Chalcidius) was the author of a Latin work containing a

partial translation of, and partial commentary on, Plato's Timaeus. Although of uncertain date, the doctrinal

content of his commentary reflects the thought of the Middle Platonist era (c.50 BC-AD 200).

Calcidius' date and place of operation are uncertain, the only clue residing in his dedication of his work to one

Osius, who has been taken, following identifications in a number of manuscripts, to be the Bishop of Corduba (AD

256-357) and spiritual advisor of Constantine. This identification has been challenged, mainly on the grounds that

Isidore of Seville makes no mention of Calcidius in his enumeration of all the Spanish writers that he knows, but

this is not conclusive. It is also true that his language is more consistent with a fifth-century than a fourth-century

date, but even this is not conclusive when weighed against considerations of content. The main issue is whether

Calcidius is to be regarded as exclusively dependent on Middle Platonist sources or as influenced also by the

Timaeus commentary of Porphyry. In fact, there are sufficient indications that, unless Calcidius was being very

selective (which does not seem to be his method), he knows nothing of Porphyry. His work seems primarily to be a

translation of a number of Middle Platonist or Peripatetic Greek sources (or even of a single such source).

Identifiable sources include the second century Peripatetic Adrastus of Aphrodisias, who wrote a commentary on

the Timaeus concentrating on the mathematical and 'scientific' aspects, and the Neo-Pythagorean Numenius.

What we have is a translation of the dialogue as far as 53c, followed by a detailed commentary, beginning with

Timaeus 31c (Calcidius ignores the introductory portion) and breaking off also at 53c (although a translation of,

and commentary on, the whole seems to have been envisaged). It is hardly suitable in the case of Calcidius to

speak of a distinct philosophical stance, since it is doubtful that he is putting much of himself into the commentary,

but he reflects various interesting Middle Platonic positions. In chapter 176, for example, he presents a sequence of

supreme god, intellect and world-soul which accords well with the systems of Numenius and Alcinous. The

supreme god is identified with the Good of Plato's Republic, but there is no need to take it as a Neoplatonic One.

At the other end of the scale, his doctrine that matter is neither corporeal nor incorporeal, but potentially both

(chaps 319-20), agrees with that of Alcinous, Apuleius and Hippolytus.