Diodorus, bishop of Tarsus enjoyed a great reputation while he was still presbyter of Antioch. Commentaries of his On the epistles are extant, as well as many other works in the manner of Eusebius the great of Emesa, whose meaning he has followed, but whose eloquence he could not imitate on account of his ignorance of secular literature.
Source: De Viris Illustribus (Illustrious Men) (New Advent)