For instance when we are smelling a flower, hearing a sound, or seeing a color, we distinguish this as smell perceived by the nostrils, as sound heard by the ears, or as color seen by the eyes; but that in us which perceives is the one sense that is behind the five senses. Thus outwardly everything we perceive as a sensation is distinguished as such and such, but immediately there comes a reaction, and that reaction is that our inner sense reflects what it has perceived on all the organs of the senses and on all the nerves of the body, touching each atom of our being. That is why it is not only the ears which have heard, but in its reaction the sound has echoed in the brain, in the mouth, in the throat, in the whole body. If it is a fragrance it has touched each atom of our body; and if it is a color it has not only touched our eyes, but it has spread its influence upon every atom of our being.