Hilary (Hilarius) of Poitiers (c. 300 – c. 368) was Bishop of Poitiers and is a Doctor of the Church. He was sometimes referred to as the "Hammer of the Arians" (Latin: Malleus Arianorum) and the "Athanasius of the West." His name comes from the Latin word for happy or cheerful. His optional memorial in the General Roman Calendar is 13 January. In the past, when this date was occupied by the Octave Day of the Epiphany, his feast day was moved to 14 January.
Hilary was born at Poitiers either at the end of the 3rd or beginning of the 4th century A.D.. His parents were pagans of distinction. He received a good education, including what had even then become somewhat rare in the West, some knowledge of Greek. He studied, later on, the Old and New Testament writings, with the result that he abandoned his Neo-Platonism for Christianity, and with his wife and his daughter (traditionally named Saint Abra), was baptized and received into the Church.
The Christians of Poitiers so respected Hilary that about 350 or 353, they unanimously elected him their bishop. At that time Arianism threatened to overrun the Western Church; Hilary undertook to repel the disruption. One of his first steps was to secure the excommunication, by those of the Gallican hierarchy who still remained orthodox Christians, of Saturninus, the Arian Bishop of Arles, and of Ursacius and Valens, two of his prominent supporters.
About the same time, Hilary wrote to Emperor Constantius II a remonstrance against the persecutions by which the Arians had sought to crush their opponents (Ad Constantium Augustum liber primus, of which the most probable date is 355). His efforts did not succeed at first, for at the synod of Biterrae (Béziers), summoned by the emperor in 356 with the professed purpose of settling the longstanding dispute, an imperial rescript banished the new bishop, along with Rhodanus of Toulouse, to Phrygia.
Hilary spent nearly four years in exile, although the reasons for this banishment remain obscure. The traditional explanation is that Hilary was exiled for refusing to subscribe to the condemnation of Athanasius and the Nicene faith. More recently several scholars have suggested that political opposition to Constantius and support of the usurper Silvanus may have led to Hilary's downfall.
While in Phrygia, however, he continued to govern his diocese, as well as wrote two of the most important of his contributions to dogmatic and polemical theology: the De synodis or De fide Orientalium, an epistle addressed in 358 to the Semi-Arian bishops in Gaul, Germany and Britain, expounding the true views (sometimes veiled in ambiguous words) of the Eastern bishops on the Nicene controversy; and the De trinitate libri XII, composed in 359 and 360, the first successful expression in Latin of that Council's theological subtleties originally elaborated in Greek. Although some members of Hilary's own party thought the first had shown too great a forbearance towards the Arians, Hilary replied to their criticisms in the Apologetica ad reprehensores libri de synodis responsa. Hilary was a firm guardian of the Trinity as taught by the Western church, and therefore saw the foreseen Antichrist in those who repudiated the divinity of the Son and thought Him to be but a created Being. "Hence also they who deny that Christ is the Son of God must have Antichrist for their Christ," was the way he stated it.
In his classic introduction to the works of Hilary Watson summarizes Hilary’s points:
Hilary also attended several synods during his time in exile, including the council at Seleucia (359) which saw the triumph of the homoion party and the forbidding of all discussion of the divine substance. In 360, Hilary tried unsuccessfully to secure a personal audience with Constantius, as well as to address the council which met at Constantinople in 360. When this council ratified the decisions of Ariminum and Seleucia, Hilary responded with the bitter In Constantium, which attacked the Emperor Constantius as Antichrist and persecutor of orthodox Christians. Hilary's urgent and repeated requests for public debates with his opponents, especially with Ursacius and Valens, proved at last so inconvenient that he was sent back to his diocese, which he appears to have reached about 361, within a very short time of the accession of Emperor Julian.
On returning to his diocese in 361, Hilary spent most of the first two or three years trying to persuade the local clergy that the homoion confession was merely a cover for traditional Arian subordinationism. Thus, a number of synods in Gaul condemneded the creed promulgated at Council of Ariminium (359).
In about 360 or 361, with Hilary's encouragement, Martin, the future bishop of Tours, founded a monastery at Ligugé in his diocese.
In 364, Hilary extended his efforts once more beyond Gaul. He impeached Auxentius, bishop of Milan, a man high in the imperial favour, as heterodox. Emperor Valentinian I accordingly summoned Hilary to Milan to there maintain his charges. However, the supposed heretic gave satisfactory answers to all the questions proposed. Hilary denounced Auxentius as a hypocrite as he himself was ignominiously expelled from Milan. Upon returning home, Hilary in 365, published the Contra Arianos vel Auxentium Mediolanensem liber, describing his unsuccessful efforts against Auxentius. He also (but perhaps at a somewhat earlier date) published the Contra Constantium Augustum liber, accusing the lately deceased emperor as having been the Antichrist, a rebel against God, "a tyrant whose sole object had been to make a gift to the devil of that world for which Christ had suffered."
According to Jerome, Hilary died in Poitiers in 367.
Recent research has distinguished between Hilary's thought before his period of exile in Phrygia under Constantius and the quality of his later major works. 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.
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.
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
Hilary is the pre-eminent Latin writer of the 4th century (before Ambrose). Augustine of Hippo called him "the illustrious doctor of the churches", and his works continued to be highly influential in later centuries. Venantius Fortunatus wrote a vita of Hilary by 550, but few now consider it reliable. More trustworthy are the notices in Saint Jerome (De vir. illus. 100), Sulpicius Severus (Chron. ii. 39-45) and in Hilary's own writings. Pope Pius IX formally recognized him as Universae Ecclesiae Doctor in 1851.
In the Roman calendar of saints, Hilary's feast day is on 13 January, 14 January in the pre-1970 form of the calendar. For English educational and legal institutions, Saint Hilary's festival lies at the start of the Hilary Term which begins in January. The name Hilary term is given in Oxford University to the term, beginning on 7 January, that includes his feast. Some consider Saint Hilary of Poitiers as the patron saint of lawyers.
From his writing St. Hilary's symbol came to be three books and a quill pen.
Sulpicius Severus' Vita Sancti Martini led to a cult of Saint Hilary as well as of St. Martin of Tours which spread early to western Britain. The villages of St Hilary in Cornwall and Glamorgan and that of Llanilar in Ceredigion bear his name.
In France most dedications to Saint Hilary are west (and north) of the Massif Central, and the cult in this region eventually extended to Canada.
In northwest Italy the church of Sant’Ilario at Casale Monferrato was dedicated to St. Hilary as early as 380.