True emptiness exists when the mind is clear and all forms have disappeared. Externally, there are no objects. Internally, there is no mind. There is only emptiness. In this state even emptiness does not exist. In true emptiness there is no space, no desire, no will; there are no appearances, no thoughts. All realms of existence are dissolved. In absolute stillness there is no self and no other. There is only Earlier Heaven in its undifferentiated whole.
Source: commentary on T'ai Shang Ch'ing-ching Ching, written in Six Dynasties Era (220-589 AD), p 69
Contributed by: Zaady