Matthew 16:18-19 from the Douay Rhiems Bible:
"18 And I say to thee: That thou art Peter; and upon this rock I will build my church, and the gates of hell shall not prevail against it. 19 And I will give to thee the keys of the kingdom of heaven. And whatsoever thou shalt bind upon earth, it shall be bound also in heaven: and whatsoever thou shalt loose upon earth, it shall be loosed also in heaven."
What did The Lord Christ mean by this? Does He not say that he's building The Universal Church upon The Rock Peter? Does He not say that the authority to bind and loose things on earth and in heaven?