From Soldier to Monk
The synaxarion presents Arsenius as a man of high birth and rank before his conversion. The son of illustrious parents at Constantinople, he was honored by the emperor and given command of the Kibyrraiote theme, one of the naval districts of the Byzantine military administration. The shipwreck that left him the sole survivor of his company is recorded as the decisive cause of his renunciation of the world.
After taking up monasticism he is described as mortifying his body through fasting, vigils, and other austerities. By tradition he is said to have occupied a narrow cell for weeks at a time and to have instructed the brethren on Sundays.