Peter uses the metaphor of the temple to describe the proper functioning of the church. The stones represent individual believers, each with their own role, but also working together toward the purpose of proclaiming the excellencies of Christ to the world. The cornerstone is Christ, whom the whole building is built around, but who is also a stumbling block for those who disbelieve.
0.5
0.75
1.0
1.25
1.5
1.75
2.0
2.25
2.5