How to Realize the Tathāgatagarbha

To discover the operation of the Tathāgatagarbha, one must be as specific as possible. The most concrete and evident operation is the functional role of producing the six consciousnesses, namely, sensation, perception, mental formations, and consciousness. The operation of the Tathāgatagarbha in outputting the four great elements within the physical body cannot be observed by anyone, possibly except for the Buddha. In inanimate objects, the operation of numerous Tathāgatagarbhas outputting the four great elements is even more unobservable. How, then, can one realize one's own Tathāgatagarbha or the Tathāgatagarbha of a single sentient being?

The Tathāgatagarbha possesses a seeing-part that can perceive all dharmas. If it could not perceive all dharmas, it would be unable to manifest, sustain, or alter all dharmas. We need only contemplate and investigate the difference between its seeing-part and the seventh consciousness, the difference from the sixth consciousness, and the difference from the five sense consciousnesses. By starting from this point to contemplate, investigate, and reflect, can we find a way out and arrive at the answers we seek. Since the Tathāgatagarbha can cognize the root-body and the realm of vessels—all of which belong to form-dust, including sound, smell, taste, touch, and dharmas, cognizing all eighteen realms—then what exactly does it cognize, and how does it cognize? This is the fundamental starting point. All dharmas are manifested by the Tathāgatagarbha. Before manifesting them, it must necessarily perceive and cognize them; it cannot blindly manifest any dharma. The key and crucial point lie in understanding the manner and content of its perception, and how this operates.