A man asked me what the difference was between Catholicism and any other random brand of religion. Even Atheism, for that matter. To answer him, I told him a story. I'm going to edit it a bit for you guys.
A man is in the middle of a giant city. All he wants is to find a pizza parlor because he's both hungry and thirsty.
He bumps into an Atheist who basically tells him there aren't any pizza parlors in the city... at least none worth going to.
Disheartened, but not hopeless, the man then sees a Muslim who is kind enough to stop and give directions. He says, "Go up ten blocks, turn left, go three lights until you hit the park, circle it, and you'll find a parlor at the end of an alley to your immediate right."
Gratiously, though slightly overwhelmed, the man thanks the Muslim and is just about to follow the directions when he spots a Jew. The Jew, too, stops and kindly gives directions, but in giving the directions left out which street the pizza parlor was on because he didn't quite remember.
Finally, a little frustrated and still super hungry, the man is about to cross the street when he is approached by a Catholic. The Catholic just says, "Hey, I heard you were looking for a pizza parlor for some grub. There's actually a place right up the street. I'm going that way. Wanna tag along?"
And within five minutes, the two of them were at a booth eating pizza.
The difference between all of these religions is that, sure, all of them have the potential to get you pizza and a coke, but Catholicism offers you the most direct route because (as Catholics) we believe that Jesus Christ, God Himself, gave us this religion in order to lead us back to Himself. And since this route was paved by God, it is the most direct.
Typically I use a "Mountain" or "Desert" analogy with this question, but this story came to mind when he asked and I think it made more sense - I found out later he's a city dweller and actually gets asked the pizza parlor question a lot. Ha ha. Go figure.