Have you ever noticed how many times in Scripture the gospel is associated with the kingdom of God?
Now, we know that “gospel” is simply an Old English word for “good news.” Thus, when the early apostles proclaimed the good news concerning Jesus Christ, they considered it good news about his kingdom. Here are a few passages (although there are many, many similar ones):
And he [Jesus] went throughout all Galilee, teaching in their synagogues and proclaiming the gospel of the kingdom and healing every disease and every affliction among the people. (Matthew 4:23 ESV)
And this gospel of the kingdom will be proclaimed throughout the whole world as a testimony to all nations, and then the end will come. (Matthew 24:14 ESV)
But when they believed Philip as he preached good news about the kingdom of God and the name of Jesus Christ, they were baptized, both men and women. (Acts 8:12 ESV)
There are other passages that don’t include the term “gospel” or “good news” but where believers are encouraging others toward the kingdom of God (what we would call “evangelism”):
And he [Paul] entered the synagogue and for three months spoke boldly, reasoning and persuading them about the kingdom of God. (Acts 19:8 ESV)
He [Paul] lived there two whole years at his own expense, and welcomed all who came to him, proclaiming the kingdom of God and teaching about the Lord Jesus Christ with all boldness and without hindrance. (Acts 28:30-31 ESV)
Finally, there are other passages that connect the kingdom of God to what some called “being saved”:
He has delivered us from the domain of darkness and transferred us to the kingdom of his beloved Son… (Colossians 1:13 ESV)
Therefore let us be grateful for receiving a kingdom that cannot be shaken, and thus let us offer to God acceptable worship, with reverence and awe… (Hebrews 12:28 ESV)
Listen, my beloved brethren: did not God choose the poor of this world to be rich in faith and heirs of the kingdom which He promised to those who love Him? (James 2:5 ESV)
So, how is the kingdom of God related to the gospel, that is, the good news of Jesus Christ? How do we proclaim the good news of the kingdom?