"It all depends upon where the consciousness places itself and concentrates itself. If the consciousness places or concentrates itself within the ego, you are identified with the ego—if in the mind, it is identified with the mind and its activities and so on. If the consciousness puts its stress outside, it is said to live in the external being and becomes oblivious of its inner mind and vital and inmost psychic; if it goes inside, puts its centralising stress there, then it knows itself as the inner being or, still deeper, as the psychic being; if it ascends out of the body to the planes where self is naturally conscious of its wideness and freedom it knows itself as the Self and not the mind, life or body. It is this stress of consciousness that makes all the difference. That is why one has to concentrate the consciousness in heart or mind in order to go within or go above. It is the disposition of the consciousness that determines everything, makes one predominantly mental, vital, physical or psychic, bound or free, separate in the Purusha or involved in the Prakriti."

-Sri Aurobindo

Volume: 22-23-24 [SABCL] (Letters on Yoga), Page: 235