Saint Hilary of Poitiers, bishop and doctor

St. Hilary was born in Poitiers, France, in the early 4th century and served as a bishop there before his death in 368. Despite hailing from a noble and likely pagan family, Hilary was baptized after studying Scripture and recognizing the truth within it.

Becoming Bishop

His extensive knowledge and devotion to the Christian faith led to him being elected as bishop of Poitiers around 350. His appointment came during a tumultuous period in the Church, due to the significant rise of Arianism - a heretical doctrine which denied the divinity of Jesus Christ.

Opposition to Arianism

St. Hilary played a crucial role in resisting Arianism, particularly against Saturninus, Bishop of Arles, a key Arian proponent. Accused of spreading heresy, Hilary was sent far away to Phrygia, due to the influence of the Arian-supporting Emperor Constantius.

Exile and Return

Despite his exile, Hilary continued his religious studies and works, composing a treatise against the synods; which in substance were Arian. In 359, Hilary was invited to an assembly of Oriental bishops at the city of Seleucia. Here, he defended the doctrines of the Gallic bishops and participated in significant theological debates. Later that year, he went to Constantinople to continue his fight against the Arian heresy. Hilary's efforts were recognized when the Arian Bishop of Arles who had persecuted him was deposed.

In 361, Hilary triumphantly returned to Poitiers, welcomed by his congregation and fellow bishops. His victory in the fight against Arianism was amplified further by this return.

Apart from his verbal attacks, Hilary also fought against heretical teachings with his writings. Hilary also visited Italy, demonstrating tolerance towards those questioning their belief but remained firm in opposing those who purposely adhered to heresies. However, his efforts to reconcile Semi-Arians and Catholics in Italy were not universally appreciated. He was eventually ordered to leave Milan by Emperor Valentinian, an Arianism supporter.

Later Years and Legacy

Hilary spent his later years in Poitiers, where he continued writing against Arianism and other heresies. St. Hilary's works and teachings have had enduring influence within the Church. His feast is celebrated on 14 January, and he was elevated to the rank of Doctor of the Universal Church by Pope Pius IX. St. Hilary continues to be venerated by Catholics for his contributions to theology and his defense of the faith.