The Buddha asked a monk:"How do you measure the length of a man's life?"
The monk answered,"By days"
The Buddha said:"You do not understand the way."
The Buddha asked another monk:"How do you measure the length of a man's life?"
The monk answered,"By the time that passes during a meal"
The Buddha said:"You do not understand the way."
The Buddha asked a third monk:"How do you measure the length of a man's life?"
The monk answered,"By the breath"
The Buddha said:"Very well, you know the way."