No division in consciousness is admissible at any time as it is always one and the same. Even the individuality of the ‘I’ must be known as false, like the delusion of a snake in a rope.
As through the ignorance of the real nature of the rope the very rope appears in an instant as a snake, so also does consciousness appears in the form of the mind [waking/dream] without undergoing any change.
There exists no other material cause of this waking/dream except consciousness. Hence these three states are but consciousness and nothing else.
All the three states is consciousness, because they arisen from consciousness, and sustained by consciousness, and finally dissolves as consciousness. The idea of the pervaded and the pervading is illusory. When this supreme truth being realized, then there is no room for any distinction between the cause and the effect.
Certainly there is no manifoldness in consciousness. The non-dual cause being an established fact, how could the mind [waking/dream] be different from consciousness, when they are created out of consciousness?