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The Bible teaches that a Christian is saved into the body of Christ, which is another name for the church. In Acts 2, the Bible says, “And the Lord added to the church daily such as should be saved.” However, it’s important to note that there will be people in heaven who were not affiliated with a church due to certain circumstances.
A saved person who loves the Lord from all his heart, mind and strength will find it a joy to fellowship with other believers in the church (Matthew 22:37). Sharing with others and hearing testimonies and Christian experiences strengthens the soul (Philippians 2:1). The Lord resembled the church as a body where all the members of the body work together in unison for the benefit of the whole (Ephesians 5:23). The believer grows spiritually in the church. If we take a piece of burning coal away from fire it gets cold. Likewise, if we take a Christian away from the church fold, he gets spiritually cold.
Paul saw the necessity for the children of God to demonstrate that those who are in harmony with God can live in full harmony with one another. When we accept Christ we become members of His body. To accomplish the greatest amount of good, the body must function as a unit (Cor. 12:12–27).
Jesus promised the disciples to shower them with the gift of the Holy Spirit but this was to take place only when they got together and prayed in one spirit (Acts 1 & 2). It was Jesus last prayer to the Father before He offered Himself as a sacrifice that the disciples would be united together and become one body “that they may be one, even as we are one” (John 17:1). This Bible based unity springing from the blended lives of Christians would be the most tool that will impress the world of the divine origin of the Christian church. “By this all will know that you are My disciples, if you have love for one another” (John 13:35).
In His service,