To the gifted and experienced musician, music is a language—to be understood in sentences, paragraphs and chapters.  The student who is still struggling with letters and words, so to speak, needs the guidance that will reveal to him the larger meanings of the musical language.  Theory, as it is called, has always been upheld as the promised gateway to this broad understanding, but there are thousands upon thousands of eager young musicians as well as disappointed older ones who will testify to the seemingly unbridgeable gap between their theoretical studies and the living experience of music itself.  … from Dr Leopold Mannes’ Preface to Dr. Felix Salzer’s book, ‘Structural Hearing’.