What is consciousness: physical or non-physical?

Following is an excerpt from a samvaad (dialogue) session with Acharya Prashant.

Questioner: Sir, whenever you have been asked what is consciousness, you have always said, all that is mind or things related to the mind is consciousness. What constitutes consciousness, how does it work?

Acharya Prashant: How this material body becomes conscious is a great mystery. There is no answer to that. Similarly, one cannot answer how the material body becomes unconscious or how the ‘praana’ leaves the body. Ramanna Maharshi used to explain this by saying that there exists a ‘jad-chetan granthi’ somewhere in the body, where the ‘jad’, which is the material body meets pure consciousness. And he would also say that the ‘granthi’ or the knot was the cause of all human suffering, and so you have to cut or severe that knot. But that was a symbolic way of just pointing towards something about which nothing concrete can be said. This, however, is not a great disadvantage because nothing concrete needs to be said.

We do not really need to know how we came to be conscious or how this material body starts showing conscious characteristics. That is not very topical. What we need to know is, how does this consciousness acquire suffering, and how can it be liberated from suffering. That is the moot question.