4 / 17 November
This great spiritual light was born in the village of Marykata in the province of Bithynia, of his father Myritrices and his mother Anastasia. He was a shepherd as a youth. Whilst tending his sheep at pasture, he would often retreat into solitude and remain in prayer the whole day, having encircled his flock with the sign of the Cross so that it should not wander off and get lost. After that, he was called into the army, and caused men to marvel at his courage, particularly in the wars against the Bulgarians. After his military service, Joannicius withdrew to Olympus in Asia Minor, where he became a monk and gave himself entirely over to asceticism, persevering in it till his death in great old age. He laboured in the ascetic life for over fifty years in various places, and had from God most abundant gifts of wonderworking: he healed all sicknesses and pains, drove out demons, tamed wild beasts, possessing a particular power over snakes; he walked dryfoot through water, became invisible to men when he so desired and foretold future events. He was distinguished by an outstanding humility and meekness. In outward appearance, he was like a giant, huge and strong. He took an active part in the destiny of God's Church, for, during the iconoclast period he was at first deluded, but then tore himself away and became an ardent defender of reverence towards the icons. He had a great friendship with Patriarch Methodius of Constantinople. Joannicius lived for ninety-four years, and entered peacefully into rest in the Lord in 846. He was a great wonderworker both during his lifetime and after his death. The Hieromatryrs Nicander, Bishop of Myra, and Hermas the Priest.
Probably of Welsh origin and of the family of St. Brychan. After living in Wales by the river Never, he settled in North Cornwall in later life in the remote and beautiful Inny valley at the place which still bears his name.
Known for his personal service to the poor.