I, Paul, write this greeting with my own hand.  If anyone has no love for the Lord, let him be accursed. Our Lord, come!  The grace of the Lord Jesus be with you.  My love be with you all in Christ Jesus. Amen. 1 Cor. 16:19-24 (ESV)
Paul writes this himself, of that he wants to leave no doubt. It is not the interpretation of one taking dictation. He writes this greeting with his own hand. "If anyone has no love for the lord, let him be accursed." The gospel cannot be forced. One cannot be coerced into believing in Christ. If they show their disbelief and hate for the Lord, being unwilling to subject themselves to him, then LET him be accursed. Leave him alone. Show him the door. We don’t have to fight with them, but neither to we have to listen to him, or bear with him. Just let him be accursed. You did your part in sharing the gospel, he is no longer your concern if he rejects Jesus. Then Paul prays Our Lord Come. We wait for that day in eagerness, when the problems of the world, will be no more, and the Church militant will be disbanded, and become the church at rest.