In Proposition 38, George Peters states:
“John the Baptist preached that this Kingdom, predicted by the Prophets, was “nigh at hand.”
Being the forerunner of the Messiah, John the Baptist was the one called by God to prepare the way for the Messiah. The message was repent for the kingdom of heaven is at hand. Why repent? Because the coming of the Messiah was right on the doorstep. We know this to be true for soon after John the Baptist declared those words, Jesus came to John to be baptized and then shortly after that the Messiah began declaring that same message, “Repent for the kingdom of heaven is at hand.” Only when Jesus declared it, the king had arrived.
The most notable observation Peters presents in Proposition 38 is the following:
“John preached “the gospel of the Kingdom,” just as Jesus, the twelve, and the seventy afterward preached it. Attention is simply directed to this, because some assert that there is no preaching of the Gospel unless a crucified Redeemer is proclaimed. But we have here and previous to the death of Jesus the gospel of the Kingdom proclaimed to the nation.”
The message was always consistent – the kingdom of heaven is at hand. The gospel of the kingdom was first and foremost one of repentance, meaning the turning away from lawlessness and disobedience to God’s law and turning towards obedience to God’s commands. The gospel of the kingdom that was taught of course also included the message of redemption. At this point, the kingdom is being declared and the message is loud and clear that the Messiah, the Son of David has come as promised long ago.