Date: 1667

"For, though Man's Soul, and Body are not onely one natural Engine (as some have thought) of whose motions of all sorts, there may be as certain an accompt given, as those of a Watch or a Clock"

— Sprat, Thomas (bap. 1635, d. 1713)

Date: 1726, 1729

"Let us Instance in a Watch--Suppose the several Parts of it taken to Pieces, and placed apart from each other: Let a Man have ever so exact a Notion of these several Parts, unless he considers the Respects and Relations which they have to each other, he will not have any thing like the Idea of a...

— Butler, Joseph (1692-1752)

Date: 1751

"If any Man hath found out a Kind of Motive which doth not affect himself, he hath made a deeper Investigation into the 'Springs, Weights, and Balances' of the human Heart, than I can pretend to."

— Brown, John (1715-1766)