Man does not close himself only from the external life, but also from the inner part which is a still more important part of his life. That inner part is also sound, that inner part is light; and when one gets in touch with this sound and this light, then one knows that language which is the language of heaven, a language which is expressive of the past, the present and the future, a language which reveals the secret and character of nature, a language which is receiving and giving that divine message which the prophets have tried at times to reveal.