Theophylact of Ohrid

The Angel who appeared said to the women: "Do not be alarmed." First he frees them from fear, and then proclaims the good news of the Resurrection. He calls Jesus Christ "the Crucified," for he is not ashamed of the Cross, which is the salvation of mankind and the foundation of all blessings. "He is risen"; from what is this evident? From the fact that "He is not here." And do you wish to be convinced? "Behold the place where He was laid." For this reason he rolled away the stone, in order to show this place.

Commentary on Mark ↗

Augustine of Hippo

He died, but he vanquished death; in himself he put an end to what we feared; he took it upon himself and he vanquished it, as a mighty hunter he captured and slew the lion. Where is death? Seek it in Christ, for it exists no longer; but it did exist and now it is dead. O life, O death of death! Be of good heart; it will die in us, also. What has taken place in our head will take place in his members; death will die in us also. But when? …

Sermon 233.3-4 ↗

Gregory the Dialogist

As though he had said, Let them fear, who love not the coming of the inhabitants of heaven; let them fear, who, weighed down with carnal desires, despair that they can ever attain to their company; but why should ye fear, ye who see your own fellow citizens. (ubi sup.) But let us hear what the Angel adds; Ye seek Jesus of Nazareth. …

Catena Aurea by Aquinas ↗

Bede

Do not be afraid, you are looking for Jesus the Nazarene who was crucified; he has risen, he is not here. Behold the place where they laid him. Do not be afraid, he says. As if he clearly states: Let those who do not love the coming of the citizens of heaven be afraid. Let those who are burdened by carnal desires and despair of being able to reach their company be afraid. But why are you afraid, who see your fellow citizens? …

On the Gospel of Mark ↗