Thaddeus of Edessa festival, and heard the preachings of John the Baptist (St. John the Forerunner). After being baptized by John the Baptist in the Jordan River, he remained in Palestine. He later met and became a follower of Jesus. He was chosen to be one of the seventy disciples, whom Jesus sent in pairs to preach in the cities and places. After Pentecost and the ascension of Jesus, Thaddeus started preaching the gospel in Mesopotamia, Syria and Persia. Thaddaeus ordained priests in Edessa, converted many to Christianity and built up the church there. He also went to Beirut to preach and founded
John the Baptist , 'Why then say the scribes that Elias must first come?' The disciples are then told by Jesus that Elijah came in the person of John the Baptist, These passages are applied to John in the Synoptic Gospels. But where Matthew specifically identifies John the Baptist as Elijah's spiritual successor (), the gospels of Mark and Luke are silent on the matter. The Gospel of John states that John the Baptist denied that he was Elijah. Many scholars believe there was contact between the early church in the Apostolic Age and what is called the "Qumran-Essene community". The Dead Sea