Sri Aurobindo
Letters of Sri Aurobindo
10. Transformation of the Subconscient and the Inconscient
It is not a fact that formless things can have no power – all 
that is necessary is that they should have a force in them. The subconscient influences the body because all in the body has developed out of the subconscient and all in itself still is only half conscious and much of its action can be called subconscious. It is therefore much more easily influenced by the subconscious than by the conscious mind and conscious will or even the vital mind and vital will except in those things in which a conscious mental or vital control has been established and the subconscious itself has accepted it. If it were not so, man’s control of his actions and physical states would be complete, there would be no illness or if there were, it would be immediately cured by mental action. But it is not so. For that reason the higher consciousness has to be brought down, the body and the subconscient enlightened by it and accustomed to obey its control.