Heard, and seen in me.--Here the reference is to his example, as subsidiary to his teaching and confirmatory of its truth.
The God of peace.--The inversion (compared with Philippians 4:7) is striking. To have the "peace of God" with us is much; to have "the God of Peace" Himself with us is more. With this promise the Letter itself ends. What follows is but postscript.
and received; not only into their heads but hearts, had embraced cordially, with great affection, in the love thereof, as well as given a full assent to:
and heard; either publicly or privately, from the pulpit, or in conversation; or had heard of him when absent, or from him when present:
and seen in me: in his life and conversation, which were well known, and were a pattern to them that believe; and therefore he adds,
do; practise the same things which they had learned from him as their duty, and had heard him urge as such, and had seen exemplified in himself:
and the God of peace shall be with you; to give that peace which is beyond the conception of a natural man, and the expression of a spiritual one, and is the great preservative through Christ; and to enable to do and to continue to do the above things, and to keep them from all harm, and every enemy of their souls; to favour them with his gracious presence here, and with endless peace hereafter.