At length he came forth into public life, and great multitudes from "every quarter" were attracted to him. The sum of his preaching was the necessity of repentance. He denounced the Sadducees and Pharisees as a "generation of vipers," and warned them of the folly of trusting to external privileges Luke 3:8 (http://bible.gospelcom.net/bible?lk+3:8). "As a preacher, John was eminently practical and discriminating. Self-love and covetousness were the prevalent sins of the people at large. On them, therefore, he enjoined charity and consideration for others. The publicans he cautioned against extortion, the soldiers against crime and plunder." His doctrine and manner of life roused the entire south of Palestine, and the people from all parts flocked to the place where he was, on the banks of the Jordan. There he baptized thousands unto repentance (see AEnon).
The fame of John reached the ears of Jesus in Nazareth Matt. 3:5 (http://bible.gospelcom.net/bible?ma+3:5), and he came from Galilee to Jordan to be baptized of John, on the special ground that it became him to "fulfil all righteousness" 3:15 (http://bible.gospelcom.net/bible?ma+3:15). John's special office ceased with the baptism of Jesus, who must now "increase" as the King come to his kingdom. He continued, however, for a while to bear testimony to the Messiahship of Jesus. He pointed him out to his disciples, saying, "Behold the Lamb of God." His public ministry was suddenly (after about six months probably) brought to a close by his being cast into prison by Herod, whom he had reproved for the sin of having taken to himself the wife of his brother Philip Luke 3:19 (http://bible.gospelcom.net/bible?lk+3:19). He was shut up in the castle of Machaerus (q.v.), a fortress on the southern extremity of Peraea, 9 miles east of the Dead Sea, and here he was beheaded at the instigation of Herodias and Salomé. His disciples, having consigned the headless body to the grave, went and told Jesus all that had occurred Matt. 14:3-12 (http://bible.gospelcom.net/bible?ma+14:3-12). John's death occurred apparently just before the third Passover of Jesus' ministry.
Jesus himself testified regarding John that he was a "burning and a shining light" John 5:35 (http://bible.gospelcom.net/bible?jn+5:35). The Eastern Orthodox believe that John was the last of the Old Testament prophets, thus serving as a bridge figure between that period of revelation and Jesus. They also have a tradition that, following his death, John descended into Hell and there once more preached that Jesus the Messiah was coming.
The Eastern Orthodox Church remembers Saint John the Forerunner on six separate feast days, listed here in order of the church year which begins on September 1: