"And blessed is the man who finds no cause of stumbling in me."

But he turned and said to Peter. "Get behind me, Satan! You are a stumbling-block to me, because you are not intent on what pleases God, but what pleases men."

"Woe unto the world because of such stumbling-blocks! They will surely come, but woe unto each man by whom they come!

"Moreover I say to you that you are Petros (a rock), and on this petra (rock) I will build my church, and the gates of Hades shall not prevail against her.