"Man sleeps almost one–third of his life, twenty years approximately. But sleep has been neglected, terribly neglected. Nobody thinks about it, nobody meditates on it. This has happened because man has paid too much attention to the conscious mind.

"Mind has three dimensions. Just as matter has three dimensions, mind also has three dimensions. Only one dimension is conscious, another dimension is unconscious, and there is still another dimension which is superconscious. These three dimensions are of the mind just like matter, because deep down mind is also matter. Or, you can say it otherwise, that matter is also mind. It has to be so, because only one exists.

"Mind is subtle matter; matter is gross mind. But ordinarily man lives only in one dimension, the conscious. Sleep belongs to the unconscious; dreaming belongs to the unconscious. Meditation, ecstasy, belong to the superconscious, just like waking and thinking belong to the conscious. So, we have to go slowly into this phenomenon of mind.

"The first thing about mind to be remembered is, it is just like an iceberg the topmost part is on the surface; you can see it, but it is only one-tenth of the whole. Nine-tenths is hidden underneath. You cannot see it ordinarily, unless you move into the depths. But these are only two dimensions. There is a third dimension as if a part of the iceberg has evaporated and has become a small cloud and hovers in the sky. It is difficult to reach to the unconscious; it is almost impossible to reach to that cloud of course part of the same iceberg, but evaporated." Osho