六祖大師法寶壇經 1.71

1.71

師示眾云：「此門坐禪，元不著心，亦不著淨，亦不是不動。若言著心，心元是妄，知心如幻，故無所著也。若言著淨，人性本淨，由妄念故，蓋覆真如。但無妄想，性自清淨；起心著淨，却生淨妄。妄無處所，著者是妄。淨無形相，却立淨相，言是工夫。作此見者，障自本性，却被淨縛。善知識！若修不動者，但見一切人時，不見人之是非善惡過患，即是自性不動。善知識！迷人身雖不動！開口便說他人是非長短好惡，與道違背。若著心著淨，即障道也。」

The Master instructed the assembly, saying: "In this gate, seated meditation originally does not attach to the mind, nor does it attach to purity, nor is it immobility. If one speaks of attaching to the mind, the mind is originally false; knowing that the mind is like an illusion, there is therefore nothing to attach to. If one speaks of attaching to purity, human nature is fundamentally pure; it is because of false thoughts that tathatā is covered over. If only there are no false thoughts, the nature is pure of itself. Producing a thought to attach to purity instead gives rise to the falsehood of purity. Falsehood has no location; that which attaches is falsehood. Purity has no shape or characteristics, yet one establishes a characteristic of purity and calls it spiritual work. Those who hold this view obstruct their own fundamental nature and are bound by purity. Good friends! If you cultivate immobility, simply when seeing all people, not seeing people's rights and wrongs, good and evil, faults and errors—this is the immobility of svabhāva. Good friends! Though the bodies of deluded people do not move, when they open their mouths they speak of other people's rights and wrongs, strengths and weaknesses, likes and dislikes, which runs contrary to the Way. Attaching to the mind and attaching to purity obstructs the Way."