The message of Jesus and Paul

Did Jesus and Paul preach different gospels? I read someone's writing (claiming to be teaching clear biblical truth) that Jesus' "gospel of the kingdom" is different than Paul's "gospel of grace."

Jesus and Paul preached the same gospel. Jesus taught that faith alone saves (Mark 16:16; John 3:14-16). Paul taught the same message (Romans 3:28; Ephesians 2:8-9; Titus 3:5). Jesus taught that he is the only Savior for people’s sins (John 14:6). Paul taught the same message (1 Corinthians 3:11).

The kingdom of which Jesus often spoke during his earthly ministry refers to his gracious rule in people’s hearts through faith (Luke 17:20-21). Paul taught that same message (1 Corinthians 4:20).

The teachings of Paul and Jesus are the same. That should not surprise us, as Paul explained that the source of his teachings was Jesus Christ himself (Galatians 1:11-12). Your question addresses the perfect unity of the Bible. For that unity, we thank God.