This divine Father, who was from Asia Minor, was from childhood reared in the royal court of Constantinople, where he was instructed in both religious and secular wisdom. Later, while still a youth, he left the imperial court and struggled in asceticism on Mount Athos, and in the Skete at Beroea. He spent some time in Thessalonica being treated for an illness that came from his harsh manner of life. He was present in Constantinople at the Council that was convened in 1341 against Barlaam of Calabria, and at the Council of 1347 against Acindynus, who was of like mind with Barlaam; Barlaam and Acindynus claimed that the grace of God is created. At both these Councils, the Saint contended courageously for the true dogmas of the Church of Christ, teaching in particular that divine grace is not created, but is the uncreated energies of God which are poured forth throughout creation: otherwise it would be impossible, if grace were created, for man to have genuine communion with the uncreated God. In 1347 he was appointed Metropolitan of Thessalonica. He tended his flock in an apostolic manner for some twelve years, and wrote many books and treatises on the most exalted doctrines of our Faith; and having lived for a total of sixty-three years, he reposed in the Lord in 1359.

His holy relics are kept in the Cathedral of Thessalonica. A full service was composed for his feast day by the Patriarch Philotheus in 1368, when it was established that his feast be celebrated on this day. Since works without right faith avail nothing, we set Orthodoxy of faith as the foundation of all that we accomplish during the Fast, by celebrating the Triumph of Orthodoxy the Sunday before, and the great defender of the teachings of the holy Fathers today.

Six months after John the Forerunner's conception, the Archangel Gabriel was sent by God to Nazareth, a town of Galilee, unto Mary the Virgin, who had come forth from the Temple a mature maiden (see Nov. 21). According to the tradition handed down by the Fathers, she had been betrothed to Joseph four months. On coming to Joseph's house, the Archangel declared: "Rejoice, thou Full of Grace, the Lord is with thee: blessed art thou among women." After some consideration, and turmoil of soul, and fear because of this greeting, the Virgin, when she had finally obtained full assurance concerning God's unsearchable condescension and the ineffable dispensation that was to take place through her, and believing that all things are possible to the Most High, answered in humility: "Behold the handmaid of the Lord; be it unto me according to thy word." And at this, the Holy Spirit came upon her, and the power of the Most High overshadowed her all-blameless womb, and the Son and Word of God, Who existed before the ages, was conceived past speech and understanding, and became flesh in her immaculate body (Luke 1:26-38).

Bearing in her womb the Uncontainable One, the blessed Virgin went with haste from Nazareth to the hill country of Judea, where Zacharias had his dwelling; for she desired to find Elizabeth her kinswoman and rejoice together with her, because, as she had learned from the Archangel, Elizabeth had conceived in her old age. Furthermore, she wished to tell her of the great things that the Mighty One had been well-pleased to bring to pass in her, and she greeted Elizabeth and drew nigh to her. When Elizabeth heard Mary's greeting, she felt her six-month-old babe, Saint John the Baptist, prophesied of the dawning of the spiritual Sun. Immediately, the aged Elizabeth was filled with the Holy Spirit and recognized her as the Mother of her Lord, and with a great voice blessed her and the Fruit that she held within herself. The Virgin also, moved by a supernatural rejoicing in the spirit, glorified her God and Savior, saying: "My soul doth magnify the Lord, and my spirit hath rejoiced in God my Saviour," and the rest, as the divine Luke hath recorded (1:39-55)

This Saint gave himself over to the ascetical life from his early youth. Experienced both in the solitary life of the hermit and in the communal life of cenobitic monasticism, he was appointed Abbot of the Monastery at Mount Sinai and wrote a book containing thirty homilies on virtue. Each homily deals with one virtue, and progressing from those that deal with holy and righteous activity (praxis) unto those that deal with divine vision (theoria), they raise a man up as though by means of steps unto the height of Heaven. For this cause his work is called "The Ladder of Divine Ascent." The day he was made Abbot of Sinai, the Prophet Moses was seen giving commands to those who served at table. Saint John reposed in 603, at eighty years of age. See also the Fourth Sunday of the Fast.