1 Peter 2:6
Why also it is contained in the scripture, Behold, I lay in Sion a chief corner stone, elect, precious…
I. STABILITY. The cornerstone upholds and is the strength of the building. So it is in the Church, whether viewed collectively, or as composed of individual Christians. Strength is in Christ alone.
II. BEAUTY. Cornerstones give beauty and ornament to a building. They are often graceful and rich, and curiously wrought; and the other and ordinary stones of the building get comeliness from the very relation in which they stand to the cornerstones. Now Christ is the beauty of the spiritual temple.
III. UNITY. Cornerstones are the medium by which the walls of a house, with all the several stones which compose those walls, are united in one building. Take away the cornerstones, and the sides of the house would be separated from each other. The stones of which the walls are built may be of different sizes, and of different degrees of value or beauty; yet so long as they are held together by the cornerstone, the house is one house; nor is there any stone in it however small or common but that stone is necessary to the unity of the house. It cannot be spared. Such is Christ as the precious cornerstone of the spiritual temple.
(A. C. Price.)
Parallel VersesKJV: Wherefore also it is contained in the scripture, Behold, I lay in Sion a chief corner stone, elect, precious: and he that believeth on him shall not be confounded.