An atheist is sitting on a park bench, when a priest walks over and
sits down.  The atheist says to the priest "How can you believe in god? You
know nothing like that can exist!"
     The priest says, "How can you say something like that, my son? Of
course God exists! Look at his work, all around you!"
     The atheist replies, "You know what I mean. The world is so
incongruous, there's no way it was created by god.  Take the hummingbird. It
spends its life flitting from flower to flower, but doesn't need to go very
far from where it was born to find food. It can live its entire life in a
small area... yet, it can fly around the world!  And then, look at the
hippo. Big, ungainly... needs hundreds of pounds of food every day, but
can't get very far to go find it. Yet, that hippo, who needs to be able to
move much more freely, can't fly! Why can't hippos fly???"
     Just then, a bird flies by, and drops an unsavory load, right between
the atheist's eyes. The priest says "I guess you just got your answer, from
on high!"