The Jerusalem Council convenes to address the circumcision controversy raised by Judean visitors to Antioch who teach that Gentiles must be circumcised and keep Moses' law to be saved. After much debate, Peter recounts the Cornelius episode, Barnabas and Paul report signs and wonders among Gentiles, and James proposes the solution citing Amos's prophecy that Gentiles called by God's name are not to be troubled with the law but should abstain from idolatrous pollution, sexual immorality, strangled meat, and blood. The council's letter, delivered by Judas and Silas, brings rejoicing to Antioch, but Paul and Barnabas later separate sharply over taking John Mark, with Barnabas and Mark sailing to Cyprus while Paul chooses Silas and travels through Syria and Cilicia strengthening churches.