Captivity and Conversion to Monastic Life
At a young age John was taken captive by Crimean Tatars. Rather than resist, he submitted meekly to his masters and dutifully accomplished the work assigned to him, accepting his condition as the will of God. After three years his father secured his ransom and freedom.
Following his release he went to Moscow and entered the Andronikov Monastery, where he was tonsured a monk with the name Barsanuphius. He gave himself to ascetical practices and became known for his virtue and piety.