One day, as Yaoshan was sitting, Shitou asked him, “What are you doing here?”
Yaoshan said, “I’m not doing a thing.”
Shitou said, “Then you’re just sitting leisurely.”
Yaoshan said, “If I were sitting leisurely I’d be doing something”
Shitou said, “You say you’re not doing anything. What is it that you’re not doing?”
Yaoshan said, “A thousand sages don’t know.”
Our ancestors batting it around in fine form there.