Luke 20:18

Or else, He who is a sinner, yet believes on Christ, falls indeed upon the stone and is shaken, for he is preserved by penitence unto salvation. But upon whomsoever it shall fall, that is, upon whom the stone itself has come down because he denied it, it shall grind him to powder, so that not even a broken piece of a vessel shall be left, in which may be drunk a little water. Or, He means by those who fall upon Him, such as only despise Him, and therefore do not yet utterly perish, but are shaken violently so that they cannot walk upright. But upon whom it falls, upon them shall He come in judgment with everlasting punishment, therefore shall it grind them to powder, that they may be as the dust which the wind scatters from the face of the earth. (Ps. 1:4.)

He mentions two condemnations or destructions of them, one indeed of their souls, which they suffered being offended in Christ. And He touches this when He says, Whosoever shall fall upon that stone shall be shaken to pieces. But the other of their captivity and extermination, which the Stone that was despised by them brought upon them. And He points to this when He says, But upon whomsoever it shall fall, it shall grind him to powder, or winnow him. For so were the Jews winnowed through the whole world, as the straw from the threshing floor. And mark the order of things; for first comes the wickedness committed against Him, then follows the just vengeance of God.

(in Marc. 12.) Or understanding it morally; to every one of the faithful is let out a vineyard to cultivate, in that the mystery of baptism is entrusted to him to work out. One servant is sent, a second and a third, when the Law, the Psalms, and the Prophets are read. But the servant who is sent is said to be treated despitefully or beaten, when the word heard is despised or blasphemed. The heir who is sent that man kills as far as he can, who by sin tramples under foot the Son of God. (Heb. 6:6.) The wicked husbandman being destroyed, the vineyard is given to another, when with the gift of grace, which the proud man spurned, the humble are enriched.