The Lord had begun warning his disciples about the dangers they would face, and also about His Passion and death. He also told them that they would be persecuted by pagans and enemies of the Gospel. He explained that these things pertain to the present life, but what is essential is eternal life. Desiring to give His disciples a foretaste of eternal life, he took three of them, Peter, James and John, and brought them up to Mount Tabor.
There He was transfigured before them and His face shone like light. Moses and Elias appeared and spoke with Jesus. The Lord took only those disciples because they were more pre-eminent than the others. Peter was chosen because he loved Christ very much, John because he also loved Christ, and James because he was able to drink the cup that Christ drank (Matthew 20:23). The Lord showed them Moses and Elias in order to correct their erroneous ideas of who He was, as though He were Saint John the Baptist, or some great prophet. That is why He revealed His glory to them ‘as far as they could bear it.’ All this took place during the Transfiguration of our Lord Jesus Christ on Mount Tabor.
The Dormition of our Most Holy Lady Theotokos and Ever-Virgin Mary: After the Ascension of the Lord, the Mother of God remained in the care of the Apostle John the Theologian, and during his journeys She lived at the home of his parents, near the Mount of Olives. She was a source of consolation and edification both for the Apostles and for all the believers. Conversing with them, She told them about miraculous events: the Annunciation, the seedless and undefiled Conception of Christ born of Her, about His early childhood, and about His earthly life. Like the Apostles, She helped plant and strengthen the Christian Church by Her presence, Her discourse and Her prayers.
The reverence of the Apostles for the Most Holy Virgin was extraordinary. After the receiving of the Holy Spirit on the day of Pentecost, the Apostles remained at Jerusalem for about ten years attending to the salvation of the Jews, and wanting moreover to see the Mother of God and hear Her holy discourse. Many of the newly-enlightened in the Faith even came from faraway lands to Jerusalem, to see and to hear the All-Pure Mother of God.