This edition of the works of Hazrat Inayat Khan for the first time provides the Russian reader with the opportunity to get acquainted with the works of this most prominent Sufi master and musician of the early 20th century, widely known throughout the world. The collection brings together works devoted to the mystical meaning of sound in words and music. This is the first issue of the series "Sufi Message". in which other works by Inayat Khan are being prepared for publication, devoted to a wide range of problems in the philosophy and practice of mysticism.