John said to Jesus, “Teacher, we saw someone driving out demons in your name, and we tried to prevent him because he does not follow us.” Jesus replied, “Do not prevent him…” Mark 9:38–39
“And so I say to you, you are Peter, and upon this rock I will build my Church, and the gates of the netherworld shall not prevail against it. I will give you the keys to the Kingdom of heaven. Matthew 16:18–19