"And Jesus came and spake unto them, saying, All power is given unto me in heaven and in earth. (19) Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost: (20) Teaching them to observe all things whatsoever I have commanded you: and, lo, I am with you alway, even unto the end of the world. Amen."
How truly gracious were the actions and words of Jesus both to the strong and weak in faith, to confirm the one, and to remove all fears from the other! All power is given unto me in heaven and in, earth. All power, as the supreme, universal, and eternal monarch of heaven and of earth. And this Jesus, as the Son of God, from his own essential nature and Godhead, possessed in common with the Father and Holy Ghost from all eternity. But the power Jesus speaks of in this place, as given unto him, is as Mediator, God-Man, the Head of his body the Church that he should give, as he elsewhere said, eternal life to as many as were given him. John 17:2
And hence he now issues his commission as the glorious Head of his body the Church, and bids them go forth to teach and baptize. And, as if to impress his whole Church, with the glorious truth that salvation is the joint gift, and flowing from the joint love and mercy, of the three Almighty persons in the Godhead, which are one; Jesus enjoins the baptism of his people in their joint name, and as dedicated to their joint service, love, adoration, and praise. And lo! saith Jesus, as finally closing his commission with an assurance of his unceasing and everlasting presence; lo! I am with you alway even unto the end of the world. Which is not meant to say that the Lord's presence was to be with the disciples of Jesus merely to the end of their ministry, or their successors in his service; but forever in the eternal world; here in grace and hereafter in glory. His perpetual presence securing their persons, defending their cause, rendering the whole of their labors effectual here upon earth, in bringing home his Church and people, and accomplishing the whole purposes of his salvation, in all the individual instances of it, for whom the whole was ordained in the ancient settlements of eternity, and bringing them all safe home to the everlasting abodes of glory.
And by way of seal to the truth, one of the names of Christ is added, Amen. All the promises in him are yea, and in him Amen. He is the Amen: the faithful and true witness. And this is the security. That he who blesseth himself in the earth, shall bless himself in the Amen; the God of truth, and he that sweareth in the earth shall swear by the Amen, the God of truth. See 2 Corinthians 1:20; Revelation 3:14; Isaiah 65:16. See Poor Man's Concordance, Amen.
Reader! the Lord give to you and to me grace, to mark Christ's name on this precious Gospel. And may the Lord himself write his Amen on our hearts. Isaiah 51:6; Revelation 3:12-13.