What does Matthew 28:2-4 mean?

2 And, behold, there was a great earthquake: for the angel of the Lord descended from heaven, and came and rolled back the stone from the door, and sat upon it. 3 His countenance was like lightning, and his raiment white as snow: 4 And for fear of him the keepers did shake, and became as dead men. (Matthew 28:2-4 KJV)

William Burkitt’s Commentary

Observe here, 1. With what pomp and triumph doth our Lord arise. The earth that quaked before at his crucifixion, quakes now again at his resurrection: it quaked then at the dissolution, now at the reunion of his human nature, to tell the world that the God of nature then suffered, and now conquered.

Observe, 2. How an angel is employed in Christ’s resurrection; He rolls away the stone. But could not Christ have risen then without the angel’s help? Yes sure, he that raised himself, surely could have removed the stone: but God thinks fit to send an officer from heaven to open the prison door of the grave; and by setting our surety at liberty, proclaims our debt to the divine justice fully satisfied. Besides, it was fit that the angels who had been witnesses of our Saviour’s passion, should also be witnesses of his resurrection.

Observe, 3. How unable the keepers of the grave were to bear the sight and presence of the angel; they shook for fear, and became as dead men. Angels being pure and perfect spirits, man is not able to bear the sight of an angel, no, not in human shape, without terror and affrightment; and if the sight of an angel be so dreadful, what is the sight of God himself?