Not raising the blind is proper courtesy. From inside, the outside is seen all the more clearly.

• Mu-gyeolIt can be seen from outside too.
  Left Minister Sim-gyuA warrior's eyes reach as far as his blade's tip. Beyond that is the court's business.
• Chief Eunuch YangI did hear laughter, from behind that blind.
  Left Minister Sim-gyuSharp ears, for an old man. I hope they stay sharp a good while longer.