Now in the fifteenth year of the reign of Tiberius Caesar, […] the word of God came unto John the son of Zachariah in the wilderness. And he came into all the country about Jordan, preaching the baptism of repentance for the remission of sins; As it is written in the book of the words of Isaiah the prophet, saying, The voice of one crying in the wilderness, Prepare the way of the Lord, make his paths straight. Every valley shall be filled, and every mountain and hill shall be brought low; and the crooked shall be made straight, and the rough ways shall be made smooth; And all flesh shall see the salvation of God.