Date: 1724

"The sudden Gusts of these Passions being thus accounted for, when they become extreme they drive about the Blood with such a Hurricane, that Nature is overset, like a Mill by a Flood: So that what drove it only quicker round before, now intirely stops it, and renders the Countenance pale and gha...

— Cheyne, George (1671-1743)

Date: 1733

"The most difficult Problem in all the Animal OEconomy, is, to give any tolerable Account of Muscular Action or Animal Motion. The Similitude of a Machin put into Action and Motion by the Force of Water convey'd in Pipes, was the readiest Resemblance the Lazy could find to explain Muscular Motion...

— Cheyne, George (1671-1743)

Date: 1790

"Their view calls off his attention from his own view; and his breast is, in some measure, becalmed the moment they come into his presence. This effect is produced instantaneously and, as it were, mechanically; but, with a weak man, it is not of long continuance."

— Smith, Adam (1723-1790)