He commenced his great work on the textual criticism of the Scriptures; and at the instigation of his friend Ambrosius, who provided him with the necessary amanuenses, he published his commentaries on the Old Testament and his dogmatic investigations.
He also published commentaries on portions of Cicero (especially the De finibus), on Ausonius, Juvenal, Curtius Rufus, and other classical authors.
Loc., and the commentaries on Neh.
His extant commentaries (those on Canticles, on the Prophets, on the book of Psalms and on the Pauline epistles - the last the most valuable) are among the best performances of the fathers of the church.
In addition to these complete commentaries, we have fragments of some others (of that on Isaiah, for example), principally met with in catenae.