There are animals and birds and insects which have grown double sets of eyes – one set of real eyes and the other of false ones. Some other creatures did, and so their eyes are in different parts of their bodies. It must have been only accidental that the first man used that part of his body for this purpose he could just as well have used any other part. What is it really that you call your eyes? It is nothing but a part of your skin, with this difference – that since time immemorial man has been using this particular part of his skin for the purpose of seeing. And there are people who see through organs other than their eyes. There are people present on this earth who hear through body organs other than their ears. If a person goes deaf and he wills strongly to hear from his fingers, it is possible that his fingers will begin to hear.