Consciousness is usually identified with mind, but mental consciousness is only the human range which no more exhausts all the possible ranges of consciousness than human sight exhausts all the gradations of colour or human hearing all the gradations of sound — for there is much above or below that is to man invisible and inaudible. So there are ranges of consciousness above and below the human range, with which the normal human has no contact and they seem to it unconscious, — supramental or overmental and submental ranges.

When Yajnavalkya says there is no consciousness in the Brahman state, he is speaking of consciousness as the human being knows it. The Brahman state is that of a supreme existence supremely aware of itself, svayamprakäsa, — it is Sachchidananda, Existence-Consciousness-Bliss. Even if it be spoken of as beyond That, parätparam, it does not mean that it is a state of Non-existence or Non-consciousness, but beyond even the highest spiritual substratum (the “foundation above” in the luminous paradox of the Rig Veda) of cosmic existence and consciousness. As it is evident from the description of Chinese Tao and the Buddhist Shunya that that is a Nothingness in which all is, so with the negation of consciousness here. Superconscient and subconscient are only relative terms; as we rise into the superconscient we see that it is a consciousness greater than the highest we yet have and therefore in our normal state inaccessible to us and, if we can go down into the subconscient, we find there a consciousness other than our own at its lowest mental limit and therefore ordinarily inaccessible to us. The Inconscient itself is only an involved state of consciousness which like the Tao or Shunya, though in a different way, contains all things suppressed within it so that under a pressure from above or within all can evolve out of it—“an inert Soul with a somnambulist Force.”

The gradations of consciousness are universal states not dependent on the outlook of the subjective personality; rather the outlook of the subjective personality is determined by the grade of consciousness in which it is organised according to its typal nature or its evolutionary stage. It will be evident that by consciousness is meant something which is essentially the same throughout but variable in status, condition and operation, in which in some grades or conditions the activities we call consciousness can exist either in a suppressed or an unorganised or a differently organised state; while in other states some other activities may manifest which in us are suppressed, unorganised or latent or else are less perfectly manifested, less intensive, extended and powerful than in those higher grades above our highest mental limit.

- Sri Aurobindo