one up one down

"Numbers it is. All music when you come to think. Two multiplied by two divided by half is twice one. Vibrations: chords those are. Do anything you like with figures juggling. Always find out this equal to that. Symmetry under a cemetery wall... Musemathematics. And you think you're listening to the etherial. But suppose you said it like: Martha, seven times nine minus x is thirtyfive thousand. Fall quite flat. It's on account of the sounds it is."

James Joyce
Ulysses