Therefore, the bodhisattva’s mind is like space, which is completely detached from everything. “Past mental states are imperceptible”: this is detach… - Huangbo Xiyun

念念不見一切相，莫認前後三際，前際無去，今際無住，後際無來，安然端坐，任運不拘，方名解脫。

The essence of the mind is empty, and the myriad conditions are all serene. It is like the great orb of the sun climbing into space—the refulgent brilliance gleams in illumination, purity without a single speck of dust. The realization [of this mind] is without new or old, without shallow or deep. Its explanation depends neither on doctrinal understanding, on teachers, nor on opening up the doors and windows [of one’s house to let in students]. Right now, and that’s it! To activate thoughts is to go against it! Afterward, [you’ll realize] this is the fundamental Buddha.

When all the Buddhas manifest themselves in the world, they proclaim nothing but the One Mind. Thus Gautama Buddha silently transmitted to Mahakasyapa the doctrine that the One Mind, which is the substance of all things, is co-extensive with the Void and fills the entire world of phenomena. This is called the Law of All the Buddhas. Discuss it as you may, how can you even hope to approach the truth through words? Nor can it be perceived either subjectively or objectively. So full understanding can come to you only through an inexpressible mystery. The approach to it is called the Gateway of the Stillness beyond all Activity. If you wish to understand, know that a sudden comprehension comes when the mind has been purged of all the clutter of conceptual and discriminatory thought-activity. Those who seek the truth by means of intellect and learning only get further and further away from it. Not till your thoughts cease all their branching here and there, not till you abandon all thoughts of seeking for something, not till your mind is motionless as wood or stone, will you be on the right road to the Gate.