A musical composition, then, in which Order prevails; in which all the factors are chosen and treated in close keeping with their logical bearing upon each other and upon the whole; in which, in a word, there is no disorder of thought or technique,—is music with Form (i.e. good Form).
A sensible arrangement of the various members of the composition (its figures, phrases, motives, and the like) will exhibit both agreement and contrast, both confirmation and opposition; for we measure things by comparison with both like and unlike. Our nature demands the evidence of uniformity, as that emphasizes the impressions, making them easier to grasp and enjoy; but our nature also craves a certain degree of variety, to counteract the monotony which must result from too persistent uniformity. When the elements of Unity and Variety are sensibly matched, evenly balanced, the form is good. On the other hand, a composition is formless, or faulty in form, when the component parts are jumbled together without regard to proportion and relation.
Which of these two conditions is the more desirable, or necessary, would seem to be wholly self-evident.
The error made by pedantic teachers is to demand too much Form; to insist that a piece of music shall be a model of arithmetical adjustment. This is probably a graver error than apparent formlessness. Design and logic and unity there must surely be; but any obtrusive evidence of mathematical calculation must degrade music to the level of a mere handicraft.
