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**Week 9: Paul’s Second Missionary Journey** **Q: What was the primary theological foundation established before Paul's second missionary journey?** A: Following the Jerusalem Council, it was clarified that **salvation is by grace, not by the Law**, which opened the door for further geographical and cultural expansion to the Gentiles [1]. **Q: What caused Paul and Barnabas to separate, and what was the result for the mission?** A: **They had a sharp disagreement** because Barnabas wanted to ta