Life is a mystery to itself

If God could explain how he made the world he would not be God. The mystery is what what separates the art from the science. Zen is more of an art than a science. 

Imagine a school that poses the method to make all its students geniuses. All of them with be boring people. You can teach the technique, but the real art is passed through osmosis. That's why Zen teachings have been passed through stories and dialogues. One can not really teach Zen. Only show the way.