Now when Jesus came into the district of Caesare′a Philippi, he asked his disciples, “Who do men say that the Son of man is?” 14 And they said, “Some say John the Baptist, others say Eli′jah, and others Jeremiah or one of the prophets.” 15 He said to them, “But who do you say that I am?” 16 Simon Peter replied, “You are the Christ, the Son of the living God.” 17 And Jesus answered him, “Blessed are you, Simon Bar-Jona! For flesh and blood has not revealed this to you, but my Father who is in heaven. 18 And I tell you, you are Peter, and on this rock I will build my church, and the powers of death shall not prevail against it. Matt 16:13-18
In the Late 1990's I was a seminarian studying at a Benedictine Monastery on the top of a mountain. In my 3rd year I was assigned the charge of giving tours of the Abbey Church. One Saturday Morning I was giving a tour to a group of pilgrims. We toured the Abbey and the residence, and finished at the Adoration chapel. I instructed the group to observe silence at all times in the Chapel.
I let them pray for a few minutes then we exited the Chapel. A young Muslim man asked me what that was in the gold vessel on the alter. I said that as Catholics we believe that Jesus gave us his real body and blood at the Last Supper to the 11 apostles in the upper room on Holy Thursday and that Jesus was truly present in the Most Blessed Sacrament. He stared at me for a few moments and finally said, "If I truly believed that My God is truly present in that room, I would NEVER leave this room!" I had no response.