Luke once again highlights Paul's ministry in Corinth, and his eloquent leadership of persuading Jews and Greeks that Jesus was the Christ, but many blasphemed against him, which prompted Paul to go to the Gentiles and preach the gospel with boldness , where many hearing, believed and were baptized.
God showed Paul that he had called him to a great ministry, and that since his conversion, God had supported him, motivated him through a vision so that he would not be silent, nor be afraid, because he kept it.