The theory is that you don't play a song the same way twice because it's jazz. That's where I'm coming from.
Van Morrison[Rock 'n' roll] music started out with some cat banging a log with a couple of pieces of stick. He sent a message across a river and although the cat on the other side receiving the message didn't know the exact words, he did understand basically something about what was being communicated.
Van MorrisonJazz comes from a tradition where it swings. Swing was the main ingredient of jazz. And once it loses the swing...well, that's it.
Van Morrison