Someone asked how and why did the Bodhisattva attain the Tao and became enlightened by observing the ebb tide? The Bodhisattva, while practicing by the sea, contemplated the sound as it increased, decreased and then came to full stop, occurring simultaneously with the ebb tide. He pondered the root of causes and finally attained enlightenment by understanding that all existence is subject to birth and death and, therefore, is impermanent. Yet the hearing is timeless, hence beyond birth and death. Those without practice can hear, but do not listen. While hearing the sounds they only think of "outside"; the sound of the tide has birth and death, but the nature of hearing does not. Why? Because even when the sound of the tide stops, our capacity or nature for hearing does not. We can still hear the wind in the branches of a tree, the songs of birds and the shrill sound of the cicadas. Had our capacity for hearing vanished with the sound, we should not be able to hear ever again. Even when all is quiet late at night, we are aware of silence or non-sound, because of our capacity for hearing. There are two kinds of hearing: One comes and goes in response to stimulation, the other functions independently of it. Thus we can safely say that although sounds have birth and death, the hearing capacity does not. It actually never vanishes. All existence, including dharmas, is impermanent and therefore subject to birth and death - just like magic, like bubbles or like shadows. The nature of hearing, on the other hand, can never be destroyed.
In that manner we come to know the bright and accomplished nature of hearing. Our mind accords with whatever we observe: If we observe birth and death, there is birth and death. If we observe non-birth and non-death, there is no birth and no death. All things are produced by the mind; they are completed through contemplation. Everyone has a mind and consequently a potential to formulate the world according to own intentions, but without effort he/she will not succeed. Nature is the substance, mind, the function. The function never separates from the substance, nor the substance from the function. Function and substance, though separate, are causally connected. Nature governs the mind and the mind is the nature's function; they mesh. Although both retain their own character, they are inseparable. Dharma practice can start right at this point. One needs to understand one's mind, see one's True Nature and following that, attain the Tao.
Kosong itu substansi
Wujud itu fungsi
kosng dan wujud tidak terpisahkan, sama halnya substansi dan fungsi tidak terpisahkan
Demikian juga True nature kita adalah kosong dan merupakan eksistensi sejati dan eksis tetapi kekosongan sejati