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: 1783

"It changes the key in a moment; relaxes and brings down the mind; and shews us a writer perfectly at his ease, while he is personating some other, who is supposed to be under the torment of agitation."

— Blair, Hugh (1718-1800)