Music. Mystery, Art and the Human Being, Paperback/Rudolf Steiner

What is music? Rudolf Steiner regards the essence of music as something spiritual, inaudible to the senses. The world of tones, borne on the vibrations of air, is not the essential element. 'The true nature of music, the spiritual element in music', he says, 'is found between the tones, lies in the intervals as an inaudible quality.'