2 Thessalonians 3:18

Whence then shall we know them, he says? For this very reason, he added, "The salutation of me Paul with mine own hand, which is the token in every Epistle: so I write. The grace of our Lord Jesus Christ be with you all." He does not here mean, that this is the token,-for it is probable that others also imitated this,-but that I write the salutation with mine own hand, as is the custom also now among us. For by the subscription the writings of those who send letters are made known.

"The salutation of me Paul with mine own hand, which is the token in every Epistle: so I write. The grace of our Lord Jesus Christ be with you all." This he says that he writes in every Epistle, that no one may be able to counterfeit them, his subscription being subjoined as a great token. And he calls the prayer a salutation, showing that everything they then did was spiritual; even when it was proper to offer salutation, the thing was attended with advantage; and it was prayer, not merely a symbol of friendship. With this he began, and with it he ended, guarding with strong walls what he had said elsewhere, and laying safe foundations, he brought it also to a safe end. "Grace be unto you and peace," he says; and again, "The grace of our Lord Jesus Christ be with you all. Amen." This the Lord also promised, saying to His disciples, "Lo, I am with you alway, even unto the end of the world." But this takes place when we are willing. For He will not be altogether with us, if we place ourselves at a distance. "I will be with you," He says, "always." Let us not therefore drive away grace.