When Ts'ao-shan left Tung-shan, Tung-shan asked him, "Where are you going?"
Ts'ao-shan said, "To an unchanging place."
Tung-shan retorted, "If it is an unchanging place, how can there be any going?"
Ts'ao-shan replied, "The going is also unchanging."
- Tung-shan, "Five Houses of Zen"