Hilary was born during the year 401, most likely in the present-day French region of Loraine. He came from a wealthy background and received a traditional aristocratic education in philosophy and rhetoric, which he expected to put to use in a secular career.
One of Hilary’s relatives, Honoratus, had founded a monastery in Lerins and given his life to the service of the Church. Honoratus was deeply concerned for Hilary’s salvation, and urged him with tears to abandon worldly pursuits for the sake of following Christ.
“On one side,” Hilary later recalled, “I saw the Lord calling me; on the other the world offering me its seducing charms and pleasures. How often did I embrace and reject, will and not will the same thing!”
“But in the end Jesus Christ triumphed in me. And three days after Honoratus had left me, the mercy of God, solicited by his prayers, subdued my rebellious soul.”
Hilary returned to his relative, humbling himself as Honoratus’ disciple and embracing his life of prayer, asceticism, and Scripture study. He sold his property, gave the proceeds to the poor, and wholeheartedly embraced the monastic life of the community in Lerins.
In 426, Honoratus became the Archbishop of Arles. Hilary initially followed him, but soon returned to the monastery at Lerins. Honoratus, however, insisted on having the assistance of his relative and disciple, and traveled to Lerins himself to retrieve him.
When Honoratus died in 429, Hilary again attempted to leave Arles and return to his monastery. But the faithful of the city sent out a search party and had him brought back, so that he could be consecrated as Honoratus’ successor.
Though he was not yet 30 years old, the new archbishop was well-prepared by his years in religious life and the time spent assisting his predecessor. As archbishop, he maintained the simplicity of a monk. He owned few possessions, put the poor ahead of himself, and continued to do manual labor.
Known for his kindness and charity, the archbishop was also remembered for publicly rebuking a government official who brought shame on the Church. He also warned lukewarm believers that they would “not so easily get out of hell, if you are once unhappily fallen into its dungeons.”
Hilary helped to establish monasteries in his diocese, and strengthened the discipline and orthodoxy of the local Church through a series of councils. He sold Church property in order to pay the ransoms of those who had been kidnapped, and is said to have worked miracles during his lifetime.
St. Hilary of Arles died on May 5, 449. Although his life was marked by some canonical disputes with Pope St. Leo I, the Pope himself praised the late Archbishop of Arles in a letter to his successor, honoring him as “Hilary of holy memory.”