And they said among themselves. Mark alone expresses this doubt; but as the other Evangelists relate that the stone was rolled away by the angel, it may easily be inferred, that they remained in perplexity and doubt as to what they should do, until the entrance was opened up by the hand of God. But let us learn from this, that in consequence of having been carried away by their zeal, they came there without due consideration. They had seen a stone placed before the sepulcher, to hinder any one from entering. Why did not this occur to them, when they were at home and at leisure, but because they were seized with such fear and astonishment, that thought and recollection failed them? But as it is a holy zeal that blinds them, God does not charge them with this fault. Matthew 28:2. And, lo, a great earthquake. By many signs the Lord showed the presence of his glory, that he might more fully prepare the hearts of the holy women to reverence the mystery. For since it was not a matter of little consequence to know that the Son of God had obtained a victory over death, (on which the principal point of our salvation is founded,) it was necessary to remove all doubts, that the divine majesty might be openly and manifestly presented to the eyes of the women. Matthew says, therefore, that there was an earthquake, by which the divine power which I have mentioned might be perceived. And by this prodigy, it was proper that the women should be allowed to expect nothing human or earthly, but to raise their minds to a work of God which was new, and surpassed the expectations of men. The raiment and the countenance of the angel, too, might be said to be rays by which the splendor of Godhead was diffused, so as to enable them to perceive that it was not a mortal man that stood near them, having the face of a man. For though dazzling light, or the whiteness of snow, is nothing in comparison of the boundless glory of God, but rather, if we wish to know him aright, we ought not to imagine to ourselves any color; yet when he makes known by outward signs that he is present, he invites us to him, as far as our weakness can endure. Still we ought to know that the visible signs of his presence are exhibited to us, that our minds may conceive of him as invisible; and that, under bodily forms, we obtain a taste of his spiritual essence, that we may seek him spiritually. Yet it cannot be doubted that, together with outward signs, there was an inward power, which engraved on the hearts of the women an impression of Deity. For though at first they were struck with amazement, yet it will appear, from what follows, that they gathered courage, and were gradually instructed in such a manner, that they perceived the hand of God to be present. Our three Evangelists, from a desire of brevity, leave out what is more fully related by John, (20:1-12) which, we know, is not unusual with them. There is also this difference, that Matthew and Mark mention but one angel, while John and Luke speak of two. But this apparent contradiction also is easily removed; for we know how frequently in Scripture instances occur of that figure of speech by which a part is taken for the whole. There were two angels, therefore, who appeared first to Mary, and afterwards to her other companions; but as the attention of the women was chiefly directed to the angel who spoke, Matthew and Mark have satisfied themselves with relating his message. Besides, when Matthew says that the angel sat on a stone, there is in his words (husteron proteron), an inversion of the order of events; or, at least, that order was disregarded by him; for the angel did not immediately appear, but while the women were held in suspense and anxiety by an event so strange and astonishing.

And they said among themselves,.... Either before they set out, or as they were going along:
who shall roll us away the stone from the door of the sepulchre? Which they saw was placed there by Joseph, or his orders: this was the only difficulty they had, that they were aware of; for they seem to know nothing of the sealing of the stone, and of the watch that was set to guard the sepulchre: things which were done on the sabbath day, on which they rested: for had they, in all likelihood they would never have attempted to have gone to it; the guard of soldiers would have been a sufficient discouragement: but all their concern was, how, and by whom, the stone should be rolled away, that lay at the door of the sepulchre; and perhaps their concern might be, not only on account of the largeness of the stone, as being too much for them to remove, but because such a stone defiled by touching it, according to the Jewish traditions (i).
(i) Misn. Oholot, c. 2. sect 4.

they said among themselves--as they were approaching the sacred spot.
Who shall roll us away the stone from the door of the sepulchre? . . . for it was very great--On reaching it they find their difficulty gone--the stone already rolled away by an unseen hand. And are there no others who, when advancing to duty in the face of appalling difficulties, find their stone also rolled away?

Who shall roll away the stone? They were not aware of the deputation of the Jewish rulers which had gone to Pilate and secured the sealing of the stone and the setting of the watch over the tomb (Matthew 27:62-66), and their only anxiety was how they would get the great stone, with which the rock-cut sepulcher was closed, rolled away.

Who shall roll us away the stone - This seems to have been the only difficulty they apprehended. So they knew nothing of Pilate's having sealed the stone, and placed a guard of soldiers there.