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.

 At the end Paul adds his autograph to authenticate his letter. "Look," he says, "this is what my handwriting is like. Mark it, so that you will know it again." And then, with the truth expounded, with praise and rebuke lovingly intermingled, he commends the Thessalonian Church to the grace of the Lord Jesus Christ. 