Matthew Poole and continuators on 1 Thessalonians 5:28

28 The grace of our Lord Jesus Christ be with you , Amen .

Having exhorted them to salute one another, he now sends them his own Salutation. Not in a Lip-complement as the Mode now is, but in a serious expression of the desire of his Soul: And this, or words to the same purpose are his Salutation in every Epistle, which he makes to be his Token, 2 Thes. 3. 17. And by Grace here he means favour, and good Will rather than inherent Grace. And all blessings which spring from Grace, as sometimes all are comprehended under the word Peace. Yet Grace and Peace are sometimes in his Salutations both joyn'd together. And though here Christ is only mentioned, yet in many other places God the Father is mention'd with him, 2 Thes. 1.2. 2 Pet. 1.2. Yea, and God the Holy Ghost also 2 Cor. 13.14. and where they are not mentioned, yet are all to be understood; for in all works ad extra they cooperate. And because Grace is so eminently manifested in the whole work of our Salvation, therefore the Apostle doth still mention it in all his Salutations. And with this he concludes this Epistle, and with this St. Iohn concludes the whole Bible, Rev. 22. ult.

And the Seal added, not to shut up, but confirm the whole, is, Amen. And is added, as the Voice of the whole Church upon reading the Epistle, as some think, and not by the Apostle himself.