Paul wrote to Timothy that he might know how to “conduct himself in the household of God, which is the church of the living God, the pillar and support of the truth” (I Timothy 3:15). This is a spiritual house which is the body of Christ, the church.
As is the case with all houses, this house has an architect. God the Father planned for the church throughout the ages. As Paul said in Ephesians 3:10-11 the church was a part of God’s eternal purpose. The new testament church was never some after-thought in the plan of God, and it was not created by men. This house has a foundation. As we read in I Corinthians 3:11 “For no man can lay a foundation other than the one which is laid, which is Jesus Christ.” The church is built on the Christ. Any other foundation is to weak to sustain it. This spiritual kingdom is unshakeable (Hebrews 13:28) because of the foundation on which it rest. This house has a purchase price. The elders of the congregation at Ephesus were told to “shepherd the church of God which He purchased with His own blood” (Acts 20:28). Thus when one obeys the gospel of Christ they are cleansed by the blood and added to His church (Acts 2:38,41,47).
While it is true that one can be saved and never join any denomination, it is also true that one cannot be saved unless they are added to the Lord’s church by the Lord Himself when they obey the gospel of Christ. Certainly if one agrees with scripture that the architect of the church is God, the foundation is Christ, and the purchase price is the blood of Jesus, then they will not argue for the unimportance of the church.
“To Him be the glory in the church and in Christ Jesus to all generations forever and ever. Amen” (Ephesians 3:21).