Humanity and ministry

I imagine Paul must have felt a bit hypocritical to encourage the new churches to be one in Christ after his bitter disagreement with Barnabas. The two friends and co-missionaries could not agree on John Mark, so they separated (Act 15:39). However, their inability to minister together did not prevent them from ministering separately. No preacher is perfect. All of us deal with typical human foibles of anger, jealousy, ambition, and grudge-bearing just like the people to whom we minister. We are not disqualified by these things. Rather, as a fellow sinner, we are qualified to preach the grace of God.