My people are American, my time is today…music must repeat the thought and aspirations of the times. - George Gershwin

A skyscraper is at the same time a triumph of the machine and a tremendous emotional experience, almost breath-taking. Not merely its height but its mass and proportions are the result of an emotion, as well as of calculation.

Modern European composers ... have very largely received their stimulus, their rhythms and impulses from Machine Age America. They have a much older tradition of musical technique which has helped them put into musical terms a little more clearly the thoughts that originated here. They can express themselves more glibly.

An entire composition written in jazz could not live.