The next question that comes is rather a fine one. Some European philosophers have asserted that this world exists because “I” exist, and if “I” do not exist, the world will not exist. Sometimes it is expressed in this way; they say, if all the people in the world were to die, and there were no more human beings, and no animals with powers of perception and intelligence, all manifestations would disappear. It seems paradoxical, but gradually we shall see clearly that this can be proved. But these European philosophers do not know the psychology of it, although they know the principle; modern philosophy has got only a glimpse of it. First we will take another proposition of these old psychologists which is rather startling, that the grossest elements are the _bhutas_, but that all gross things are the results of fine ones. Everything that is gross is composed of a combination of minute things, so the _bhutas_ must be composed of certain fine particles, called in Sanskrit the _tanmâtras_. I smell a flower; to smell that, something must come in contact with my nose; the flower is there and I do not see it move towards me; but without something coming in contact with my nose I cannot smell the flower. That which comes from the flower and into contact with my nose are the _tanmâtras_, fine molecules of that flower, so fine that no diminution can be perceived in the flower. So with heat, light, sight, and everything. These _tanmâtras_ can again be subdivided into atoms. Different philosophers have different theories, and we know these are only theories, so we leave them out of discussion. Sufficient for us that everything gross is composed of things that are very, very minute. We first get the gross elements, which we feel externally, and composing them are the fine elements, which our organs touch, which come in contact with the nerves of the nose, eyes and ears. That ethereal wave which touches my eyes, I cannot see, yet I know it must come in contact with my optic nerve before I can see the light. So with hearing, we can never see the particles that come in contact with our ears, but we know that they must be there. What is the cause of these _tanmâtras_? A very startling and curious answer is given by our psychologists,--self-consciousness. That is the cause of these fine materials, and the cause of the organs. What are these organs? Here is first the eye, but the eye does not see. If the eyes did see, when a man is dead, and his eyes are still perfect, they would still be able to see. There is some change somewhere; something has gone out of the man, and that something, which really sees, of which the eye is the instrument, is called the organ. So this nose is an instrument, and there is an organ corresponding to it. Modern physiology can tell you what that is, a nerve centre in the brain. The eyes, ears, etc., are simply the external instruments. It may be said that the organs, _Indriyas_, as they are called in Sanskrit, are the