John the Baptist’s message was very simple and direct. The single most important point he made could be summed up in one sentence, “Repent ye: for the kingdom of heaven is at hand” (Matthew 3:2). The Greek word translated repent, metanoeo (met-an-eh´-o) means “to think differently or afterwards that is reconsider” (3340). At the core of John’s message was the idea of looking at the world differently, to see things from God’s perspective. The kingdom of heaven had to do with the rule of God and was considered to be both a present reality and a future hope for the Jewish people that lived during Jesus’ ministry on earth (Note on Matthew 3:2). The unique time period in which John preached was a key factor in the way he talked to people about repentance. According to John, time was of the essence; there was no time to waste when it came to getting right with God.
Some of John’s harshest messages were directed at the religious leaders that appeared to be righteous, but were only pretending to be interested in God’s kingdom. What the religious leaders really wanted was to control the Jews behavior. They made up rules that they expected everyone to lived by, but the rules were actually too difficult for the people to follow. Matthew 3:7-12 states about John:
But when he saw many of the Pharisees and Sadducees come to his baptism, he said unto them, O generation of vipers, who hath warned you to flee from the wrath to come? Bring forth therefore fruits meet for repentance: and think not to say within yourselves, We have Abraham to our father: for I say unto you, that God is able of these stones to raise up children unto Abraham. And now also the axe is laid unto the root of the trees: therefore every tree which bringeth not forth good fruit is hewn down and cast into the fire. I indeed baptize you with water unto repentance: but he that cometh after me is mightier than I, whose shoes I am not worthy to bear: he shall baptize you with the Holy Ghost, and with fire: whose fan is in his hand, and he will throughly purge his floor, and gather his wheat into the garner; but will burn up the chaff with unquenchable fire.
John’s introduction of the spiritual concept of fruit was meant to make people aware of the fact that God wanted to see evidence of the change that had taken place in people’s hearts. Merely saying that someone had repented was not enough. As fruit is a tangible sign that a tree is reproducing or bringing forth a new source of life, so fruit in a Christian’s life showed that a real change of heart had taken place and a new way of living would follow.