Once upon a tyme~

A man is driving down the road and breaks down near a monastery.
He goes to the monastery, knocks on the door, and says, "My car
broke down. Do you think I could stay the night?"

The monks graciously accept him, feed him dinner, even fix his
car. As the man tries to fall asleep, he hears a strange sound.
A sound not like anything he's ever heard before. The Sirens
that nearly seduced Odysseus into crashing his ship comes to
his mind. He doesn't sleep that night. He tosses and turns
trying to figure out what could possibly be making such a
seductive sound. The next morning, he asks the monks what the
sound was, but they say, "We can't tell you. You're not a monk."

Distraught, the man is forced to leave.

Years later, after never being able to forget that sound, the
man goes back to the monastery and pleads for the answer again.

The monks reply, "We can't tell you. You're not a monk."

The man says, "If the only way I can find out what is making
that beautiful sound is is to become a monk, then please, make
me a monk."

The monks reply, "You must travel the earth and tell us how
many blades of grass there are and the exact number of grains
of sand When you find these answers, you will have become a
monk."

The man sets about his task. After years of searching he returns
and knocks on the door of the monastery. "I have traveled the
earth and have found what you have asked for: By design, the
world is in a state of perpetual change. Only God knows what
you ask. All a man can know is himself, and only then if he
is honest and reflective and willing to strip away self
deception."

The monks reply, "Congratulations. You are now a monk. We shall
now show you the way to the mystery of the sound."

The monks lead the man to a wooden door, where the head monk
says, "The sound is beyond that door."

The monks give him the key, and he opens the door. Behind the
wooden door is another door made of stone. The man is given the
key to the stone door and he opens it, only to find a door made
of ruby. And so it went that he needed keys to doors of emerald,
gold and diamond.

Finally, the monks say, "This is the last key to the last door."

The man is apprehensive to no end. His life's wish is behind the
door! He unlocks the door, turns the knob, and behind that door
he is utterly amazed to find the source of that haunting and
seductive sound... But I can't tell you what it is because
you're not a monk.