Another favorite means of arresting the attention was by modulation; not used in a constructive in different keys, but to furnish the ear with a pure… - Walter Raymond Spalding

Next to rhythm, modulation is the most stimulating and enchanting element in music. No composition of any scope can be considered truly great unlesss it abounds in beautiful modulations. Certain composers, to be sure, have in this respect more genius than others—notably Schubert, Chopin, Wagner and Franck whose music seems to waft us along on a magic carpet of delight. But just as Unity depends upon a definite basic tonality, so Variety is gained by this very freedom of modulation. … By the perfect balance in his works of these two related elements a genius may be definitely recognized.

Music is of such power and glory that we should be ready to devote to its study as much time as to a foreign language.

We realize, and with our inborn equipment can appreciate, the moving power of music; but to define, in the usual sense of the term definition, what music really is, will be forever impossible. The fact indeed that music—like love, electricity and other elemental forces—cannot be defined is its special glory. It is a peculiar, mysterious power; quite in a class by itself, although with certain aspects which it shares with the other arts.