The central idea ot this writing of mine (which initially moved me to do it) is the surpassing of the illusion in attributing elements which are solely mental, to the external environment. The sounds of which I speak in this writing, but also the colours, the tastes, the smells, the pains, and other concepts like big and small, tall and short, good and bad, complex and simple, warm and cold, and so on, are in my opinion present only mentally, some as sensations of which we have direct experience, and some others as concepts which are abstract, subjective and relative. As conscious beings, we are in direct contact with our consciousness, where perceptions of different kinds "arise". Since our consciousness has the characteristic of displaying the sensorial perceptions in a three-dimensional space, it's perhaps for this reason that it seems -- illusionary -- obvious that what we perceive sensorially is outside of us exactly as it appears to us. Probably it is not possible and neither necessary to avoid this illusion, not necessary because it anyway seems functional, but perhaps it's a good thing to be aware of it. just love music....50% of the money will be given to jigsaw charity to help an inderpendent school for children with autism and other behavioural problems based in the u.k