Keeping the unity of the Spirit means we must not do anything that is intended to disrupt the unity of the body. Unity gives the church a powerful witness.
Peace is right relationships between individuals and groups. When the relationships break down we are left with the opposite, strife and war. Sin broke the relationship between God and man. Jesus’ death and resurrection healed the relationship between God and man allowing there to be peace. Sin also breaks the relationships between people. Strife between people comes when each person is interested in themselves more that other people. When we stop looking out for our own best interests and start caring for others, then we will have peace with them.
Peace and unity among Christians should come because of all that we have in common. Verse 4 to 6 tell us that we all have the same body, Spirit, hope, Lord, faith, baptism, and God.
Christ is the head, the church is the body. I spent many years working with people who have spinal cord injuries. Their brain works fine but due to a part of their body being dysfunctional, their ability to do certain activities is highly limited. The body limits the head from accomplishing all that it wants. When Christians do not live in unity we limit the work that Christ can do with His body.
The same Holy Spirit works in each of us. The Spirit gives each Christian their ability and place in the body. God’s original plan was for all the Christians living in an area to worship together. Then the local church would have each of God’s gifts represented. However, due to our preference for associating with people like us, people usually worship together with people who have the same or similar gifts. They then go so far as to assume that when another church exhibits a gift not present in their church, or does not exhibit a gift that their church does that the other church is wrong.
Our only hope is God’s ability to bring us to perfection, to change us into the person He wants us to be. Every Christian has exactly the same hope of spiritual growth. Without this hope we are all lost. Therefore we should not look at other Christians and judge them when they have sins that we do not have. Neither should we envy them when their relationship with God is better than ours is.
Jesus Christ is Lord of His whole church. Therefore, no specific church should be jealous or defensive of any other church or group. We should work together. Too often Christians and churches spend more time fighting with each other than they do fighting the devil. Any time an organization has different departments that don’t work together as a team, there will be a diminishing of effectiveness. When Christians do not work together we diminish the work we have been called to do.
Faith is believing that God is able and will do what He promised. God has promised that if we trust and obey Him then He will forgive and strengthen us. He has also promised that someday Jesus will return and then He will live with us forever. Christians may have different creeds, doctrines, or theologies but we all have only one faith.
Baptism is a symbolic act of dying to our old life and becoming a new creature. The method of baptism may vary, but the symbol remains the same for every believer.
The final, but most important unifying factor is God, Who is the Father of us all. There is only one God. He has called every Christian into His family. If God chose and accepts them, who are we to reject them?
God has provided for us to live in unity by giving us the power to do so. Each of us has the power of God working in us. Verse 7 tells us that Jesus decides who receives how much each Christian has been appointed. We all are given grace in our own amount. We are therefore held accountable for what we do with the talents and abilities that He has given us.
Verse 11 says that God provides different people with different abilities. In this way God delegates responsibility with each person responsible to use his or her own gift to the best of their ability. We do not choose what gift we receive so we do not get to choose in what manner we serve. God has already prepared good works for you to do (2:10). The purpose of our gifts is not personal fulfillment ( 4:12), though that can be a pleasant side-effect, but the building up of the body.
This building up will continue until all of God’s people have reached perfect spiritual maturity (4:13). Once we are mature we will be firm in our beliefs and not so easily deceived (4:14).
When each part of the body works like it should, the body can do amazing things.