Shoyoroku - Case 66: Kyuho's "Head and Tail"

A monk asked Kyuho,
  "What is the head?"
Kyuho said,
  "Opening the eyes and not perceiving the dawn."
The monk said,
  "What is the tail?"
Kyuho said,
  "Not sitting on a ten-thousand-year-old sitting place."
The monk said,
  "What if there is a head, but no tail?"
Kyuho said,
  "After all, it is not valuable."
The monk said, 
  "What if there is a tail, but no head?"
Kyuho said,
  "Being complacent, yet having no power."
The monk said,
  "What if the head matches the tail?"
Kyuho said, 
  "The descendants will prosper, but it is not known in the room."