I had a discussion once with some friends who understood everything about me except my Catholic beliefs.
"The Bible says, 'call no man father' so how can you address a priest that way?" they asked. They thought they had me on the spot.
"I'll answer that after you tell me what Christ meant when He said, 'my body is real food and my blood is real drink.'" I answered. "And explain to me what the keys to the kingdom, given to Peter, were."
They didn't follow up.
Good questions!