He was of Persian origin, born in Syria. As a young man, he distinguished himself as a member of the court of the Emperor Theodosius the Younger. Seeing the vanity of the world's honors and pleasures, he became a monk in Constantinople; but when the people began to praise his holiness, he fled to Mount Oxeia near Chalcedon, which later became known as Auxentius' Mountain. There he built a small hut and lived in reclusion; but in time he was discovered by some shepherds, and the faithful began to come in increasing numbers for his teaching, blessing, prayers and healing. He performed countless miracles, but such was his humility that he always sought to avoid their being attributed to him. When he was asked to pray for someone's healing, he would try to refuse, saying "I too am a sinful man." But, when he was prevailed on by the pleas of the people, he would call on all of them to pray together for the healing; or he would remind them that God would give according to their faith; or he