Franz Kafka: Everything that lives is in flux. Everything that lives emits sound. But we only perceive a part of it. We do not hear the circulation of the blood, the growth and decay of our bodily tissue, the sound of our chemical processes. But our delicate organic cells, the fibres of brain and nerves and skin are impregnated with these inaudible sounds. They vibrate in response to their environment. This is the foundation of the power of music. We can set free these profound emotional vibrations. In order to do so, we employ musical instruments, in which the decisive factor is their own inner sound potential. That is to say: what is decisive is not the strength of the sound, or its tonal colour, but its hidden character, the intensity with which its musical power affects the nerves. [Music] must … elevate into human consciousness vibrations which are otherwise inaudible and unperceived… [bring] silence to life… uncover the hidden sound of silence. More here.