The Gāthā on Transmitting the Dharma by the Seventh Patriarch Vasumitra

Original text: 心同虚空界，示等虚空法；证得虚空时，无是无非法。

Explanation: The eighth consciousness of sentient beings is like empty space—without form or appearance, unconditioned and without action, without wishes or seeking, without speech or demonstration. It is on account of this one great matter that the Buddhas appear in the world, revealing and teaching sentient beings the tathāgatagarbha mind-dharma, which is like unto empty space. When sentient beings hear the Buddha's teaching, diligently cultivate practice, and realize the tathāgatagarbha with its mind-capacity vast as empty space, they will gradually discover that all dharmas in the world have no independent self-existing essence; all arise, manifest, and appear through the tathāgatagarbha in accordance with conditions, and are entirely the result of the functions, essence, and workings of the tathāgatagarbha. Thus each dharma is empty in its very essence; in its very essence it is the emptiness-natured mind, the tathāgatagarbha. Its relationship with the tathāgatagarbha is neither one nor different: there are parts that are the same, yet also different essences and functions. There is no dichotomy of "is" or "is not."