Luke 20:17

Christ is called a stone on account of His earthly body, cut out without hands, (Dan. 2:34.) as in the vision of Daniel, because of His birth of the Virgin. But the stone is neither of silver nor gold, because He is not any glorious King, but a man lowly and despised, wherefore the builders rejected Him.

But holy Scripture compares to a corner the meeting together of the two nations, the Jew and the Gentile, into one faith. (1 Pet. 2:7. Eph. 2:20.) For the Saviour has compacted both peoples into one new man, reconciling them in one body to the Father. Of saving help then is that stone to the corner made by it, but to the Jews who resist this spiritual union, it bringeth destruction.

As if He said, How shall the prophecy be fulfilled, except that Christ, being rejected and slain by you, is to be preached to the Gentiles, who will believe on Him, that as the corner stone He may thus from both nations build up one temple to Himself?

For the rulers of the people rejected Him, when they said, This man is not of God. (John 9:16.) But He was so useful and so precious, that He was placed as the head stone of the corner.

(de con. Ev. lib. iv. cap. 70.) Or else, in the multitude of which we are speaking there were those who craftily asked our Lord by what authority He acted; there were those also who not craftily, but faithfully, cried aloud, Blessed is he who cometh in the name of the Lord. And so there would be some who would say, He will miserably destroy those husbandmen, and let out his vineyard to others. Which are rightly said to have been the words of our Lord Himself, either on account of their truth, or because of the unity of the members with the head; while there would be others also who would say to those who made this answer, God forbid, inasmuch as they understood the parable was spoken against themselves. It follows, And he beheld them, and said, What is this then that is written, The stone which the builders rejected, the same is become the head of the corner?