“You Can’t Touch Me, I Have Been Baptized”

A professor stood before his philosophy class with some items in front of him.  When the class began, without saying a word, he picked up a very large, empty mayonnaise jar and proceeded to fill it with golf balls. He then asked the students if the jar was full. They agreed it was.

The professor then picked up a box of pebbles and poured them into the jar as well.  He shook the jar lightly.  The pebbles rolled into the open areas between the golf balls.  He then asked the students again if the jar was full. They agreed it was.