Man's subtle bodies and centres - the aura, the solar plexus, the chakras

'For thousands of years men have worked to multiply and amplify the sensations and perceptions entering their consciousness through their five senses, and it is this play on the keyboard of the senses that they call civilization and culture. Well, is this not rather meagre? However much we cultivate and refine our five senses they will always be severely limited in scope for they belong to the physical plane: they will never be capable of exploring any reality above or beyond the physical.
Until human beings recognize that there are other areas that invite exploration, other dimensions to see, touch and breathe, they will never experience new, richer, more far-reaching or subtler sensations. Each of our organs is specialized: it has its own particular function to perform and it can convey only its own particular type of sensation. In order to experience other, new sensations, we must call into play those other, subtler organs and centres which we all possess.' Omraam Mikhaël Aïvanhov