Rock ’n roll is really swing with a modern name. It began on the levees and plantations, took in folk songs, and features blues and rhythm. It's the rhythm that gets to the kids – they're starved of music they can dance to, after all those years of crooners.
She danced the dance of flames and fire,
and the dance of swords and spears;
she danced the dance of stars and the dance of space,
and then she danced the dance of flowers in the wind.
All the dancer's gestures are signs of things, and the dance called rational, because it aptly signifies and displays something over and above the pleasure of the senses.
For hardly any man dances when sober, unless he is insane. Nor does he dance while alone, nor at a respectable and moderate party. Dancing is the final phase of a wild party with fancy decorations and a multitude of delights.