Date: 1664

"You can think of our machine's heart and arteries, which push the animal spirits into the cavities of its brain, as being like the bellows of an organ, which push air into the wind-chests; and you can think of external objects, which stimulate certain nerves and cause spirits contained in the ca...

— Descartes, René (1596-1650)

Date: 1748, 1749

"As the string of a violin or harpsichord trembles and vibrates, so the fibres or strings of the brain struck by the undulating rays of sound, are excited to return or repeat the words that touched them."

— Julien Offray de La Mettrie (1709-1751)

Date: 1900, 1901

"Deep in our souls we should hear the strains of our inner life’s unbroken melody,--a music that is ofttimes gay, but more frequently plaintive and always original."

— Bergson, Henri-Louis (1859-1941)