One late autumn night, the disciple awoke crying. So the master asked the disciple,

"Did you have a nightmare?"

"No."

"Did you have a sad dream?"

"No," said the disciple. "I had a sweet dream."

"Then why are you crying so sadly?"

The disciple wiped his tears away and quietly answered,

"Because the dream I had can't come true."

Taken from a Bittersweet Life http://www.imdb.com/title/tt0456912/