In those days John the Baptist came, preaching in the wilderness of Judea and saying, “Repent, for the kingdom of heaven has come near.” This is he who was spoken of through the prophet Isaiah:“A voice of one calling in the wilderness, ‘Prepare the way for the Lord, make straight paths for him.’”
-Matthew 3:1-3
The story of John the Baptist is found in each Gospel, with different bits and pieces of the story. His ministry was also foretold in the Old Testament, and yet he was a surprising choice, this man who wore clothes made of camel’s hair and who ate locusts and wild honey. But God often uses people that we aren't expecting.
John's ministry was teaching and calling people to repentance: "But when he saw many of the Pharisees and Sadducees coming to where he was baptizing, he said to them: “You brood of vipers! Who warned you to flee from the coming wrath? Produce fruit in keeping with repentance. And do not think you can say to yourselves, ‘We have Abraham as our father.’ I tell you that out of these stones God can raise up children for Abraham. The ax is already at the root of the trees, and every tree that does not produce good fruit will be cut down and thrown into the fire." (vs. 7-10)
What does the Bible mean when it talks about "preparing the way" for Jesus? It's clear from John's example that this preparation is one of the heart. God uses John to reveal and stir up the conscience of the people; to stir up a true God-based sense of justice and morality, not just their own righteousness.
John's call was for the people to change their minds about how one becomes part of the Kingdom of God. Not just preparing the way for Jesus, but preparing us for the arrival of Jesus, our hearts.
The story of John reminds us to enter into this season of Advent in a new way: just as God sent John to prepare the way of the Lord, would you consider that there might be something more that God would like to do with each one of us?