V.2-3 If we walk humbly, meekly, patiently, putting up with one another, because we love each other, then we will be able to keep the unity of the Spirit. This unity of the Spirit is not the unity of the body. God keeps that unity. But we are to do all in our power to keep the oneness of fellowship. We don’t establish it, we maintain it. Satan has succeeded in making many denominations which call themselves Christian. And there may be true believers in them, but the Spirit of God could not guide 2 believers into 2 different fellowships. God would then be confusing people. The Spirit of God wants to gather all believers around one Center. And that Center is Christ. We find that one center? in the same way as we did when we got saved. We surrendered our will and our own ideas of our goodness. Then the Spirit of God will gather us to Christ.
V.4-6 There are three circles here. The first in verse 4. Within this circle are only true believers in the Lord Jesus Christ. Being born again is the door into this circle. The second circle is in verse 5. To say “I am a Christian” does not make me one. This circle is made up of true believers and also those who only say they are. In other words, there are professors and possessors in this one. Baptism is the door into it. The third is in verse 6 and has all the people in the world in it. Being born as an infant is the door into it. The end of verse 6 brings us back to believers again.
V.7-16 Every believer can do something for the Lord. And grace and the ability to do it are given to everyone to do it. The Lord Jesus gives these gifts to the believers to help them.