‘One day Caoshan came to his master to request permission to go on a pilgrimage.
“Where are you going?” asked Master Dongshan.
“I am going to a place that neither changes nor is different,” Caoshan replied.
Master Dongshan then asked, “If you’re going to some place that isn’t any different, then why are you leaving?”
Caoshan, being an outstanding disciple, replied, “Even if I go, nothing changes and nothing is different.”‘ (quoted in Unfathomable Depths)