"When modes of music change, the fundamental laws of the state change with them. Through foolishness they, the people, deceived themselves into thinking that there was no right or wrong in music, that it was to be judged good or bad by the pleasure it gave. . . as it was, the criterion was not music but a reputation for promiscuous cleverness and a spirit of law breaking."
~ Plato(I heard this while watching a documentary about music.)