St. John was born about the year 676. He was famous for his great encyclopedic knowledge and theological method, which later was a source of inspiration to St. Thomas Aquinas.
The Saint vigorously opposed the Iconoclast persecution of the Emperor of Constantinople, Leo the Isaurian, and he distinguished himself in the defense of the veneration of sacred images. He was condemned to have his right hand cut off, but lived to see it miraculously restored through the intercession of the Blessed Virgin. After continued persecutions he died in peace, about the year 749.
PRAYER: Grant, O Lord, that we may be aided by the prayers of St. John, Your Priest. May the true Faith that he taught with excellence be our constant light and strength. Amen.