Sermon on Matthew 3:1-12 for the Second Sunday in Advent.
https://www.biblegateway.com/passage/?search=matthew+3%3A1-12&version=NIV

In verse 2 John’s preaching is boiled down to a sentence: Repent, for the kingdom of heaven is near. Let’s flesh out the image. Picture two different realms. There’s heaven, where God dwells. Then there’s earth, where we are. God’s original design was for those two realms to overlap. God and people together. The Father with his children. But the children rebelled against their Father and, as a result, those two realms were split apart. Sin separates people from God. John’s message—the kingdom of heaven is near—was that God was on his way to fix that. God himself would take away the sin and restore the universe to the way it’s supposed to be. That’s where the repent part comes into play. When God arrives, will you be ready for him, or are you going to be clutching on to the sin that he’s come to do away with?