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.
All Commentaries on Matthew 28:2 Go To Matthew 28
John Chrysostom
AD 407
After the resurrection the angel appeared. But for what purpose did he come? To roll back the stone. Why? To attest to the women of the resurrection so that they might believe. The women themselves had earlier witnessed him in the sepulcher. Now they behold an empty tomb. This is why the angel rolled the stone away and why an earthquake took place: that they might be thoroughly aroused and awakened to the resurrection. The Gospel of Matthew, Homily