10. Then he writes also an epistle: ‘John to the seven churches which are in Asia, grace be with you, and peace.’ But the evangelist did not prefix his name even to the Catholic Epistle; but without introduction he begins with the mystery of the divine revelation itself: ‘That which was from the beginning, which we have heard, which we have seen with our eyes.’ For because of such a revelation the Lord also blessed Peter, saying, ‘Blessed art thou, Simon Bar-Jonah, for flesh and blood hath not revealed it unto thee, but my heavenly Father.’