Verses 17-18 “17And 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?
18Whosoever shall fall upon that stone shall be broken; but on whomsoever it shall fall, it will grind him to powder.”
These two verses are the conclusion of the Parable of the Vineyard, a parable about how the Jewish people had failed God, had killed God’s Son, and had lost their favored position with God. Now we learn that Jesus is the cornerstone rejected (Psalm 118:22), but He is the Head and the Solid Rock upon which all of God’s work in this world is built. Some stumble over Christ, miss His plan and purpose altogether, and end up being judged by that same Solid Rock.