As for the subconscient that is best dealt with when the opening of the consciousness to what comes down from above is complete. Then one becomes aware of the subconscient as a separate domain and can bring down into it the silence and all else that comes from above. <ref>http://incarnateword.in/cwsa/31/the-subconscient-and-the-integral-yoga#p49</ref>
== Silence and Conscious Sleep ==
The only cure for insomnia is to get rid of the need for sleep by knowing how to obtain mental silence at will. When you can obtain silence at will, you must put your body into a position of absolute repose, stretched out comfortably on the bed; then you go within yourself until there is perfect mental silence and enter a state that is something like a very deep sleep. <ref>http://incarnateword.in/cwm/17/30-may-1966#p3</ref>
Generally, when you have what you call dreamless sleep, it is one of two things; either you do not remember what you dreamt or you fell into absolute unconsciousness which is almost death—a taste of death. But there is the possibility of a sleep in which you enter into an absolute silence, immobility and peace in all parts of your being and your consciousness merges into Sachchidananda. You can hardly call it sleep, for it is extremely conscious. In that condition you may remain for a few minutes, but these few minutes give you more rest and refreshment than hours of ordinary sleep. You cannot have it by chance; it requires a long training. (The Mother, 21 April 1929) <ref>http://incarnateword.in/cwm/03/21-april-1929#p11</ref>
The sleep you describe in which there is a luminous silence or else the sleep in which there is Ananda in the cells, these are obviously the best states. The other hours, those of which you are unconscious, may be spells of a deep slumber in which you have gone out of the physical into the mental, vital or other planes. You say you were unconscious, but it may simply be that you do not remember what happened; for in coming back there is a sort of turning over of the consciousness, a transition or reversal, in which everything experienced in sleep except perhaps the last happening of all or else one that was very impressive, recedes from the physical awareness and all becomes as if a blank. There is another blank state, a state of inertia, not truly blank, but heavy and unremembering; but that is when one goes deeply and crassly into the subconscient; this subterranean plunge is very undesirable, obscuring, lowering, often fatiguing rather than restful, the reverse of the luminous silence. <ref>http://incarnateword.in/cwsa/31/sleep#p50</ref>
= How to Practice Silence? =