Matthew 28:18

And Jesus came and spake unto them - It is supposed by some that the reason why any doubted was, that when they saw Jesus at first, he was at a distance; but when he came up, drew near to them, they were fully persuaded of the identity of his person.

All power is given unto me - Or, All authority in heaven and upon earth is given unto me. One fruit of the sufferings and resurrection of Christ is represented to be, his having authority or right in heaven to send down the Holy Spirit - to raise up his followers thither - and to crown them in the kingdom of an endless glory: in earth, to convert sinners; to sanctify, protect, and perfect his Church; to subdue all nations to himself; and, finally, to judge all mankind. If Jesus Christ were not equal with the Father, could he have claimed this equality of power, without being guilty of impiety and blasphemy? Surely not; and does he not, in the fullest manner, assert his Godhead, and his equality with the Father, by claiming and possessing all the authority in heaven and earth? - i.e. all the power and authority by which both empires are governed?

All power is given unto me in heaven and in earth - The "Son of God," as "Creator," had an original right to all things, to control them and dispose of them. See John 1:3; Colossians 1:16-17; Hebrews 1:8. But the universe is put under him more particularly as Mediator, that he might redeem his people; that he might gather a church; that he might defend his chosen; that he might subdue all their enemies, and bring them off conquerors and more than conquerors, Ephesians 1:20-23; 1 Corinthians 15:25-27; John 5:22-23; Philippians 2:6-11. It is in reference to this, doubtless, that he speaks here power or authority committed to him over all things, that he might redeem, defend, and save the church purchased with his own blood. His mediatorial government extends, therefore, over the material world, over angels, over devils, over wicked men, and over his own people.

28:18 All power is given to me - Even as man. As God, he had all power from eternity.