The bible does not support the idea of being a Christian who does not belong to any particular church.
Acts 2 describes the start of the church. The apostle Peter preached a very convicting sermon and when he was done, many people were baptized. When they were baptized, they were added to the church.
The word “church” comes from an ordinary Greek word that has taken on a religious meaning. “Church” comes from “ekklēsia,” which means assembly. It is a group of people. When someone becomes a Christian, he or she joins that group of people.
In one sense, there is only one church, made up of all Christians. This is sometimes described as the universal church. The bible refers to the church as the body of Christ (Ephesians 5:23; Colossians 1:18, 24). And there is only one body.
But in another sense, there are many churches, each made up of the Christians who work together in a geographical area.
See also: Romans 16:16; 1 Corinthians 16:1, 19
Where possible, elders exercise leadership over, not the universal church, but the local church where they reside.
See also: Acts 14:23; Titus 1:5
All Christians are part of the universal church. Christians that work together in the same area are part of the same local church. But is it necessary to work together with Christians in your local area?
Working together is a huge part of being a Christian. Choosing not to participate in this would prevent the body of the Church from operating at full strength.
See also: 1 Corinthians 12:12-27; Ephesians 4:11-16
Finally, Christians are supposed to be united and a close knit group. This does not seem possible if we refuse to participate with the Christians in our own area and be a part of the local church.
See also: Acts 2:46-47; Romans 12:9-16; 1 Thessalonians 4:9-10; 1 Peter 3:8; 1 John 3:16