Matthew 21:44

Then, that they might know that the penalty is not limited to their being cast out, He added the punishments also, saying, "Every one that falleth on this stone, shall be broken; but upon whomsoever it shall fall, it shall grind him to powder." He speaks here of two ways of destruction, one from stumbling and being offended; for this is, "Whosoever falleth on this stone:" but another from their capture, and calamity, and utter destruction, which also He clearly foretold, saying, "It will grind him to powder." By these words He darkly intimated His own resurrection also. Now the Prophet Isaiah saith, that He blames the vineyard, but here He accuses in particular the rulers of the people. And there indeed He saith, "What ought I to have done to my vineyard, that I did not;" and elsewhere again, "What transgression have your fathers found in me?" And again, "O my people, what have I done unto thee? and wherein have I grieved thee?" showing their thankless disposition, and that when in the enjoyment of all things, they requited it by the contraries; but here He expresses it with yet greater force. For He cloth not plead, Himself, saying, "What ought I to have done that I have not done?" but brings in themselves to judge, that nothing hath been wanting, and to condemn themselves. For when they say, "He will miserably destroy those wicked men, and will let out the vineyard to other husbandmen," they say nothing else than this, publishing their sentence with much greater force. With this Stephen also upbraids them, which thing most of all stung them, that having enjoyed always much providential care, they requited their benefactor with the contraries, which very thing itself was a very great sign, that not the punisher, but the punished, were the cause of the vengeance brought upon them.

Whoso sinneth, yet believeth on Him, falls indeed upon a stone and is broken, yet is not altogether crushed, but is preserved to salvation through endurance. But on whomsoever it shall fall, that is, whomsoever this stone shall itself assault, and whosoever shall utterly deny Christ, it shall so crush him, that not a bone of him shall be left in which a drop of water could be taken up.

(Quaest. Ev. i. 30.) Or, Those that fall upon Him, are those that despise and afflict Him. These do not perish utterly, but are broken so that they walk not upright. But upon these He shall fall when He shall come from above in judgment with a punishment of destruction, and thence He says, Shall grind them to powder, because the wicked are like the dust which the wind scattereth abroad on the face of the earth. (Ps. 1:4.).

Christ is called A Stone, not only because of His strength, but because He mightily crushes His enemies; whence it follows, And whosoever shall fall on this stone shall be broken, and on whomsoever it shall fall, it shall grind him to powder. It is one thing to be broken, and another to be ground to powder. Of what is broken there remains something; but what is ground to powder is as it were converted into dust. And what falls upon a stone is not broken by any power of the stone, but because it fell heavily, either by reason of its weight, or of its fall from a great height. So a Christian in sinning, perishes, but not to the utmost that Christ can destroy; but only so far as he destroys himself, either by the greatness of his sin, or by his exalted rank. But the unbelievers perish to the utmost that Christ can destroy them.