Christ links repentance with the Kingdom of God and believing the gospel. Once one hears the true gospel and believes it, he begins to change the way he thinks. Peter ties repentance with forgiveness of past sins and God's giving of His Spirit. Once the Ethiopian eunuch heard Philip's explanation of the Bible, he changed his thinking (repented) and was baptized. Initial repentance includes recognition, acceptance, and belief of the true gospel and making changes in one's life to conform to the new way.
Martin G. Collins
Basic Doctrines: Repentance
Is it not clear that Jesus Christ came preaching the Kingdom of God (Matthew 4:17-23; 9:35; 10:7; 24:14; Luke 4:43; 8:1; 9:2, 60; Luke 16:16)? Does this not suggest that this was what He wanted to be preached at all times? It certainly seems that way! It was His only focus! He says He had to go and preach to other cities the Kingdom of God, and He sent His disciples out, saying, "You preach the Kingdom of God too."
Richard T. Ritenbaugh
It was in the Gentile area of Galilee—not in Jewish Jerusalem to the south—where Christ began His ministry of light. In Romans 11:11, Paul asserts that "salvation has come to the Gentiles." Peter, in citing Joel in his first sermon, understands the Gentiles to be spiritually "in the region and shadow of death," in deep darkness, with clouds obscuring their vision of God's salvation. He relates Joel to Pentecost because, on that day, God spread apart those clouds to allow the light of His salvation to reach the Gentiles, dispelling their gloom. What happened in Acts 2 gave the Gentiles the hope that they could build a relationship with the God of salvation. The hope of the Gentiles becomes the theme of the book of Acts, as seen, for example,
» in the preaching by Philip to the Ethiopian eunuch (Acts 8);
» in the work by Peter with Cornelius and his family (Acts 10); and
» in Paul's ministry to the Gentiles in every city he visited. God called Paul "to bear My name before Gentiles" (Acts 9:15). Chapters 11 through 28 of Acts relates how Paul did that.
Peter's Trumpets Message—on Pentecost
Other Forerunner Commentary entries containing Matthew 4:17:
1 Corinthians 2:2