Death used to be something natural: when you ceased breathing, your heart would stop a few minutes later, and at that point even the gods couldn't bring you back to life.
人的死亡，本來是很自然的，一口氣接不上來就「斷氣了」；呼吸停止後，緊接著心跳也將於幾分鐘內停止，此時就是大羅天仙也回生乏術。