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In the waking state we experience the physical world, in the dream state our experience corresponds to the etheric astral world, in the deep sleep state we enter a still higher level of experience which is that of the God whose will is expressed in the other and lower two worlds. This God the Hindus call Ishvara; I have called it World-Mind. Now underlying these three states and therefore the Reality, the consciousness, the real consciousness underneath them, man experiences as enlightenment. The other three are states whereas this is the Reality supporting those three states--waking, dream, and deep sleep. In deep sleep man reaches God, it might be said, but owing to his ignorance he is unaware so he does not benefit by it.
-- Notebooks Category 19: The Reign of Relativity > Chapter 3 : The States of Consciousness > # 193