Now we command you, brothers, in the name of our Lord Jesus Christ, that you withdraw yourselves from every brother who walks in rebellion, and not after the tradition which they received from us.
Every sin does not require the formal action of the congregation to "withdraw thyself." We do not fellowship any sin, but we do not necessarily withdraw fellowship from every person for every sin committed. The scriptures specify sins that require withdrawal (1 Corinthians 5:1-13; Romans 16:17; Titus 3:10; 2 John 1:9-10). The point is withdrawal of fellowship should be enforced by every congregation upon every person who commits sins worthy of it. The scriptures provide several lists of sins that require this withdrawal. While every sin threatens one’s soul, every sin does not require this severe treatment.