From, Aaron Copland, On Music.

How this term “serious” came into being no one seems to know, but all of us are agreed as to its inadequacy. It just doesn’t cover enough cases. Very often our “serious” music is serious, sometimes deadly serious, but it can also be witty, humorous, sarcastic, sardonic, grotesque and a great many other things besides. It is, indeed, the emotional range covered that makes it “serious” and, in part, influences our judgment as to the artistic stature of any extended composition.

Everyone is aware that so-called serious music has made great strides in general public acceptance in recent years, but the term itself still connotes something forbidding and hermetic to the mass audience. They attribute to the professional musician a kind of Masonic initiation into secrets that are forever hidden from the outsider. Nothing could be more misleading.

We all listen to music, professionals and non-professionals alike, in the same sort of wayin a dumb sort of way, really, because simple or sophisticated music attracts all of us, in the first instance, on the primordial level of sheer rhythmic and sonic appeal. Musicians are flattered, no doubt, by the deferential attitude of the layman in regard to what he imagines to be our secret understanding of music. But in all honesty we musicians know that in the main we listen basically as others do, because music hits us with an immediacy that we recognize in the reactions of the most simple-minded of music listeners.

It is part of my thesis that music, unlike the other arts, with the possible exception of dancing, gives pleasure simultaneously on the lowest and highest levels of apprehension. All of us, for example, can understand and feel the joy of being carried forward by the flow of music. Our love of music is bound up with its forward motion; nonetheless it is precisely the creation of that sense of flow, its interrelation with and resultant effect upon formal structure, that calls forth high intellectual capacities of a composer, and offers keen pleasures for listening minds. Music’s incessant movement forward exerts a double and contradictory fascination: on the one hand it appears to be immobilizing time itself by filling out a specific temporal space, while generating at the same moment the sensation of flowing past us with all the pressure and sparkle of a great river.

To stop the flow of music would be like the stopping of time itself, incredible and inconceivable. Only a catastrophe of some sort produces such a break in the musical discourse during a public performance. Musicians are, of course, hardened to such interruptions during rehearsal periods, but they don’t relish them. The public, at such times, look on, unbelieving. I have seen this demonstrated each summer at Tanglewood during the open rehearsals of the Boston Symphony Orchestra. […]

Musical flow is largely the result of musical rhythm, and the rhythmic factor in music is certainly a key element that has simultaneous attraction on more than one level. To some African tribes rhythm is music; they have nothing more. But what rhythm it is! Listening to it casually, one might never get beyond the earsplitting poundings, but actually a trained musician’s ear is needed to disengage its polyrhythmic intricacies. Minds that conceive such rhythms have their own sophistication; it seems inexact and even unfair to call them primitive. By comparison our own instinct for rhythmic play seems only mild in interest needing reinvigoration from time to time.