Four monks were meditating in a monastery when, all of a sudden, the prayer flag on the roof started flapping.
The youngest monk came out of his meditation and said, "Flag is flapping."
The second, more experienced monk said, "Wind is flapping."
The third monk, who had been there for more than twenty years, said, "Mind is flapping."
The fourth monk, who was the eldest, said, "Mouths are flapping!"
