The Chief Cornerstone

Matthew 21:42-44 (NKJV)
42 Jesus said to them, “Have you never read in the Scriptures: ‘The stone which the builders rejected has become the chief cornerstone. This was the Lord’s doing, and it is marvelous in our eyes’?
43 “Therefore I say to you, the kingdom of God will be taken from you and given to a nation bearing the fruits of it.
44 And whoever falls on this stone will be broken; but on whomever it falls, it will grind him to powder.”