Man, living today the life of externality, has become so accustomed to the outside life that he hardly thinks of just sitting alone. When he is alone he busies himself with a newspaper or something else, always working with the life which is outside, always occupied with the life outside himself. In this way man loses his attachment to the life which is within. So his life becomes superficial, and the result is nothing but disappointment. There is nothing in this world in the form of sound, visible or audible, which is so attractive as the sound within; for all that the senses touch and all that is intelligible to the mind of man has its limitation. It has its limitation in time and effect; it makes no effect beyond that.