This sermon explores the nature of conflict within the Christian community through the biblical account of Paul and Barnabas' disagreement over whether to take John Mark on their second missionary journey. It distinguishes between two types of conflict—deeply theological disputes, such as the Jerusalem Council's debate over salvation by faith alone versus adherence to Mosaic law, and wisdom-based disagreements, like the decision about Mark's inclusion—highlighting that both require discernment and biblical principles. The preacher emphasizes that while disagreement is inevitable and sometimes necessary, especially when core convictions are at stake, believers must avoid both peace-faking and peace-breaking responses, instead choosing to move forward with grace, humility, and a willingness to change one's mind, as Paul later did by welcoming Mark back into ministry. Ultimately, the sermon calls the church to hold realistic expectations about conflict, recognizing that Christ, not human unity or perfection, is the true foundation and sustainer of the church, and that even in division, God continues to advance His redemptive work through imperfect people. Sermon Outline: 1. Two Types of Disagreements 2. Are You Willing to Disagree? 3. Are You Willing to Move On?