A perception, sudden as blinking, that subject and object are one, will lead to a deeply mysterious understanding; and by this understanding you will… - Huangbo Xiyun

If one definitively understands that all dharmas are fundamentally nonexistent and that there is nothing that can be attained, with no reliance and no abiding, no subject and no object, without activating false thoughts—this is to realize bodhi. And when one realizes enlightenment, this is only to realize the fundamental Buddha of the mind. To pass through eons of effort is nothing but useless cultivation. Just as when the warrior attained his pearl he merely attained the pearl that was originally on his forehead, and this had nothing to do with his ability to seek elsewhere. Therefore the Buddha has said, “I have truly not attained anything in the ultimate bodhi.”

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.

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。