next week master Myoken, master Keisen and a few disciples will go to Johanneshof for the yearly koan study with Baker roshi. This time the 21st koan from the Shoyoroku will be studied. The koan goes like this:

Ungan Sweeps the Ground

When Ungan was sweeping the ground, Dôgo said, “You are working hard, aren’t you.”

Ungan said, “You should know there is one who does not work hard.”

Dôgo said, “Is that so? You mean there is a second moon?”

Ungan raised his bamboo broom and said, “What number moon is this?”

Dôgo was silent.

Here is an interesting commentary, that you can also read.