Another important cornerstone was “the head of the corner” (Ps 118:22), this expression apparently referring to the topmost and hence the crowning stone of a structure. By means of it the two walls meeting at the corner would be held together at the top so that they would not fall apart and the structure collapse.

Psalm 118:22 discloses that the stone rejected by the builders would become “the head of the corner” (Heb., roʼsh pin·nahʹ). Jesus quoted and applied this prophecy to himself as “the chief cornerstone” (Gr., ke·pha·leʹ go·niʹas, head of the corner). (Mt 21:42; Mr 12:10, 11; Lu 20:17) Just as the topmost stone of a building is conspicuous, so Jesus Christ is the crowning stone of the Christian congregation of anointed ones, which is likened to a spiritual temple. Peter also applied Psalm 118:22 to Christ, showing that he was “the stone” rejected by men but chosen by God to become “the head of the corner.”​—Ac 4:8-12; see also 1Pe 2:4-7.