While Hilary closely followed the two great Alexandrians,
Origen and
Athanasius, in exegesis and Christology respectively, his work shows many traces of vigorous independent thought.
Exegetical Among Hilary's earliest writings, completed some time before his exile in 356, is his
Commentarius in Evangelium Matthaei, an allegorical exegesis of the first
Gospel. This is the first Latin
commentary on
Matthew to have survived in its entirety. Hilary's commentary was strongly influenced by Tertullian and Cyprian, and made use of several classical writers, including Cicero, Quintilian, Pliny and the Roman historians. Hilary's expositions of the
Psalms,
Tractatus super Psalmos, largely follow
Origen, and were composed some time after Hilary returned from exile in 360. Since Jerome found the work incomplete, no one knows whether Hilary originally commented on the whole Psalter. Now extant are the commentaries on Psalms 1, 2, 9, 13, 14, 51–69, 91, and 118–150. The third surviving exegetical writing by Hilary is the
Tractatus mysteriorum, preserved in a single manuscript first published in 1887. Because
Augustine cites part of the commentary on
Romans as by "Sanctus Hilarius" it has been ascribed by various critics at different times to almost every known Hilary.
Theological Hilary's major theological work was the twelve books now known as
De Trinitate. This was composed largely during his exile, though perhaps not completed until his return to Gaul in 360. Another important work is
De synodis, written early in 359 in preparation for the
councils of Ariminium and Seleucia.
Historical works and hymns Various writings comprise Hilary's historical works. These include the
Liber II ad Constantium imperatorem, the
Liber in Constantium inperatorem,
Contra Arianos vel Auxentium Mediolanensem liber, and the various documents relating to the Arian controversy in
Fragmenta historica. Some consider Hilary as the first Latin Christian hymn writer, because Jerome said Hilary produced a
liber hymnorum. Three hymns are attributed to him, though none are indisputable. ==Reputation and veneration==