There's a debate whether the Jerusalem Council in Acts 15 is the same time as Galatians chapter 1 or Galatians chapter 2. God uses real, fallible people. Barnabas' strength and Paul's strength came into conflict because Paul wanted to not take Mark and Barnabas wanted to give Mark another chance. They split, with Barnabas travelling with Mark and Paul travelling with Silas and Timothy. The Lord leads Paul in a dream to go to Macedonia. In Philippi and they encounter a slave girl who had a spirit of divination.