Finally then, brothers, we beg and exhort you in the Lord Jesus, that as you received from us how you ought to walk and to please God, that you abound more and more.
by the Lord Jesus: The grammatical construction shows that Paul personally beseeches the Thessalonians and that his exhortation rests on an appeal to the authority of Christ. "What he laid on the consciences of the saints did not originate with himself but with the Lord, to Whose authority, therefore, he appealed" (Hogg and Vine 111).