Zachary Smith hosts YUZ on Yun Men's Appropriate Statement (Response). He describes the topic as follows:
Yun Men, when asked about the meaning of Buddhism - that is, of the whole body of the Buddhist Teaching - famously responded, “An appropriate statement,” and in the commentaries (Blue Cliff Record case 14) this is called, “An iron hammerhead with no handle-hole,” (and also, “A rat gnawing on ginger” but never mind that). Nonetheless we’ll be seeing if we can get a handle on the story and the message it delivers about how to live creatively and skillfully in any time but especially in these “interesting” times.
Zachary is a Zen priest, Dharma transmitted teacher, and a long-time practitioner. You can find his bio here.