Date: 1733

"I have formerly suggested, that the best Similitude I can form of the Nature and Actions of this Principle upon the Organs of its Machin, is that of a skillful Musician playing on a well-tun'd Instrument."

— Cheyne, George (1671-1743)

Date: 1751

"The sympathy, therefore, or consent observed between the nerves of various parts of the body, is not to be explained mechanically, but ought to be ascribed to the energy of that sentient being, which seems in a peculiar manner to reside in the brain, and, by means of the nerves, moves, actuates,...

— Whytt, Robert (1714-1766)