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: 1712

"See, how resistless Orators perswade, / Draw out their Forces, and the Heart invade: / Touch ev'ry Spring and Movement of the Soul, / This Appetite excite, and That controul."

— Blackmore, Sir Richard (1654-1729)

Date: 1712

"What Philosophic Builder will essay / By Rules Mechanic to unfold the way / How a Machine must be dispos'd to think, / Ideas how to frame, and how to link?"

— Blackmore, Sir Richard (1654-1729)

Date: 1712

Lucretius and Epicurus are asked, "How to the Mind a Thought reflected goes, / And how the conscious Engine knows it Knows."

— Blackmore, Sir Richard (1654-1729)

Date: 1712

"Tell us, Lucretius, Epicurus, tell, / And you in Wit unrival'd shall excel, / How thro' the outward Sense the Object flies, / How in the Soul her Images arise. / What Thinking, what Perception is, explain; / What all the airy Creatures of the Brain; / How to the Mind a Thought reflected goes, / ...

— Blackmore, Sir Richard (1654-1729)

Date: 1723

"Can'st say what diff'rent Turns the Spirits take, / When they of diff'rent Kinds Impressions make; / What vital Springs those Spirits in their Flight / Strike to cause Torment, what to give Delight."

— Blackmore, Sir Richard (1654-1729)

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: October 1750, 1752, 1791

"The less the body to the view, / The soul (like springs in closer durance pent) / Is all exertion, ever new, / Unceasing, unextinguish'd, and unspent"

— Smart, Christopher (1722-1771)

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)

Date: 1752

A puppet may be "compell'd by secret Springs" just as an engine "moves with Motions not its own"

— Duncombe, John (1729-1786) [pseud.]