Brotherhood is about people — the people who make up a congregation. It is about accepting people and helping people. It is about allowing people to help us. It is about loving people — even the ones we almost wish we could hide when visitors come to church. It is about realizing that each brother and sister in the congregation is a gift of God to our congregation.
The body of Christ is made up of real people with real weaknesses (and real strengths, though we may not always notice them). When we reject any of these people, we reject Christ. To remain in the body of Christ, we must learn brotherhood.