‘Turning circumstances and turning mind is rejected by the great sage. Speaking of mind and speaking of essence is not agreeable to buddha ancestors. Seeing into mind and seeing into essence is the activity of people outside the way. Confined words and phrases do not lead to liberation. There is something free of all these views. That is: Green mountains are always walking, and Eastern mountains travel on water. Study this in detail.’ (Shobogenzo Sansuikyo)
And if you don’t believe that mountains are walking, you should pay more attention.