折疑論 3.69

3.69

子曰。未能事人。焉能事鬼。曰敢問死。子曰。未知生焉知死（論語。註曰。晝夜者死生之道也。知生之道。則知死之道。盡事人之道。則盡事鬼之道。死生人鬼一而二。二而一者也。或言。夫子不告。子路不知。此所以深告之也）。

The Master said, 'Before you are able to serve men, how can you serve ghosts?' He said, 'I venture to ask about death.' The Master said, 'Before you know life, how can you know death?' (In the Analects. The commentary says: Day and night are the way of death and life. If one knows the way of life, one knows the way of death. If one exhausts the way of serving men, one exhausts the way of serving ghosts. Death and life, men and ghosts, are one yet two, two yet one. Some say: The Master did not tell him because Zilu did not understand, and this is how he profoundly instructed him.)