As Jesus is the cornerstone upon which the Church is built, so are his teachings the unifying cornerstone of Christian doctrine.
Opposing or Following Jesus
When Peter rebuked Jesus’ regarding his prophecy of his crucifixion, Jesus rebuked him in turn calling him Satan. The word Satan simply means adversary, someone in opposition. Peter was opposed to Jesus’ plans. Jesus said, “Get behind me, Satan.” The same word for “behind” is translated in the very next verse as “follower.” Jesus was telling Peter to quit being an adversary but get behind him by following him. When we try to take the lead away from Jesus, we are an adversary. When we create church rules in opposition to the essentials of the faith espoused by Jesus then we are an adversary of his. When we try to be more righteous than Jesus we are in opposition to him. In effect Jesus is also saying to us, “Back me up, you who are in opposition.” (Matthew 16:21-28)