One of the more famous remarks concerning Peter is in Matthew 16: 15-16, 18  "He (Jesus) said to them, But who do you say that I am?  And Simon Peter answered and said, you are the Christ, the Son of the living God….And I (Jesus) say also to you, that you are Peter, (Petros, in Gteek, meaning a small pebble)  and on this rock (Petra, in Greek, meaning a large rock, boulder, cornerstone) I will build my church; and the gates of hell shall not prevail against it."

You can see the gestures as Jesus points at Peter, names him, and tells Peter that he got it right.  Jesus is the Christ.  At the same time, he tells him (Peter) that he is a small rock.  Then Jesus turns his hand and points toward himself and says, "…upon this large rock I will build my church…"  No one but Jesus was ever intended to be the cornerstone of the church.  We are all the the small stones built on the foundation of Jesus Christ.

Peter was quite specific about this when he gave his his speech in the temple in Acts 4: 10a, 11-12 (after Christ's death).  He tells all the people, "Be it known to you all...by the name of Jesus Christ…who God raised from the dead…the stone which was set at nought of you builders, (the Jewish leadership) which is become the head of the corner.  Neither is there salvation in any other; for there is no other name under heaven given among men, whereby we must be saved."

Paul says it this way:  Ephesians 2: 20-22  "And (you) are built upon the foundation of the apostles, (all of them) and prophets, (all of them).  Jesus Christ himself being the chief corner stone; In whom all the building, fitly framed together grows to a holy temple in the Lord:  In whom you also are builded together for an habitation of God through the Spirit."

That's us.  We are all resting on those who have gone before us.  We are the church.  God inhabits us.  We are the temple of God.