In other words, apart from the known and the unknown, what else is there? ~Harold Pinter
From the limited perspective of the mental dimension, there is nothing more than the known and the unknown and the mind is experienced as the alpha and the omega of reality. From a holistic perspective, however, there is much more beyond the mind.
The most ancient philosophies of holism established four levels of human reality. The first level is the waking state. The second level is the dream state. The third level is the deep sleep state and the fourth level is the state of witness consciousness. As delineated by these ancient philosophies, consciousness is the substratum of all human experience and the four levels are offered as proof of the validity of consciousness as the Source.
The philosophical explanation is easy to understand and is as follows. Who is always watching your experience while you are awake? Who is the witness of your dream state? Who really experiences the dream and reports it to you when you wake? Who is the witness of the deep sleep state? Who experiences deep sleep and informs you when you wake that you have enjoyed deep sleep? Who is the witness of the three states of waking, dream and deep sleep?
The answer to all of these questions is, “Who else but consciousness”? Source is a witnessing consciousness and it is also the substratum of all experience.
The philosophical explanation continues to state that a witnessing consciousness can only truly watch itself. If there is only one, then that one can only experience itself. A witnessing consciousness that watches itself is thus a unified consciousness. It is one and whole.
Consider how this truth applies in this moment. Who is watching as you read these words on this computer screen? It is consciousness. The words that you read are also consciousness and so is the computer screen on which they appear. Thus, consciousness is watching consciousness or consciousness is watching itself. Within this awareness, right here and right now, you are experiencing unified consciousness or wholeness.
The same fact is true within all your experience. Consciousness can only ever watch itself. It is the same when you are dreaming and when you are deeply sleeping. It is also the same when you meditate. You are consciousness watching yourself. There is only one.
During meditation, when you actualize the subtle dimensions beyond the mind, you experience relative reality as the oscillation of the polarities of presence and absence. Who is watching when you are present and when you are absent? It is consciousness. Who informs you that you have been present or absent? It is always watching consciousness. In truth, you are an eternally witnessing consciousness watching yourself as both relative polarities.