Ching-yuan Wei-hsin, a Chinese Ch'an master, once said this:
Thirty years ago, when having not studied Ch'an, this monk saw mountain was mountains and water was water.
Later, when following the good teacher's guide, this monk...
Along the riverbank under the trees, I discover footprints!
Even under the fragrant grass I see his prints.
Deep in remote mountains they are found.
These traces no more can be hidden than one's nose, looking heavenward.
Comment: Understanding the teaching, I see the footprints of the bull. Then I learn that, just as many utensils are made from one metal, so too are myriad entities made of the fabric of self. Unless I discriminate, how will I perceive the true from the untrue? Not yet having entered the gate, nevertheless I have discerned the path.