"Music is a science which should have definite rules; these rules should be drawn from an evident principle; and this principle cannot really be known to us without the aid of mathematics."

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The time was simply ripe for the disappearance of tonality. Naturally this was a fierce struggle; inhibitions of the most frightful kind had to be overcome, the panic fear, 'Is that possible, then?' So it came about that gradually a piece was written, firmly and consciously, that wasn't in a definite key any more.

— Anton Webern