Date: 1691

"The Brain, which is the principle of all Sense and Motion, the Fountain of the Animal Spirits, the Chief Seat and Palace Royal of the Soul; upon whose security depends whatever Privilege belongs to us as Sensitive or Rational Creatures."

— Ray [formerly Wray], John (1627–1705)

Date: 1691

"I cannot conceive the true Cause hereof [that Men of Learning are uncouth in their discourse], unless it be, that as Plants are Choakt by over-much Moisture, and Lamps are Stifl'd with too much Oil; so are the Actions of the Mind overwhelm'd by over-abundance of Matter and Study."

— Blount, Thomas Pope, Sir (1649-1697)

Date: 1697

"As a Ship at Sea running swiftly thro the Waves, leaves behind a Track, which is almost as soon lost as made, so that no sign can be found of its Passage thro that fluid Element: So the moisture of the Brain may be susceptible of an Idea for the present, but 'tis not lasting, nor is there any si...

— D'Assigny, Marius (1643-1717)

Date: 1698

"The Matter is so Contrived that the Smut and Scum of the Thought rises uppermost; And like a Picture drawn to Sight, looks always upon the Company."

— Collier, Jeremy (1650-1726)

Date: 1708, 1714

"The Human Mind and Body are both of 'em naturally subject to Commotions: and as there are strange Ferments in the Blood, which in many Bodys occasion an extraordinary discharge; so in Reason too, there are heterogeneous Particles which must be thrown off by Fermentation."

— Cooper, Anthony Ashley, third earl of Shaftesbury (1671-1713)

Date: Tuesday, January 22, 1712

"Upon examining this Liquor [in the pericaridum of the coquet], we found that it had in it all the Qualities of that Spirit which is made use of in the Thermometer, to shew the Change of Weather."

— Addison, Joseph (1672-1719)

Date: 1727

"It is without Doubt, that Fancy and Imagination form a world of Apparitions in the Minds of Men and Women; (for we must not exclude the Ladies in this Part, whatever we do) and People go away as thoroughly possess'd with the Reality of having seen the Devil, as if they convers'd Face to Face wit...

— Defoe, Daniel (1660?-1731)

Date: April 30, 1730

"The spirit of the brain, distilled by the heat of the imagination, like some chemical preparations, when exposed to the air, is apt to smoke, to take fire, to crack, and bounce, to the no small disturbance of the neighbourhood."

— Richard Russel and John Martyn

Date: 1731

"And indeed the Reason is the same both in Visibles and Audibles; for the Sense of a Man, by reason of its Vicinity and Neighbourhood to Reason and Intellectuality, lodged in the same Soul with if, must needs be Coloured with some Tincture of it; or have some Passive Impresses of the fame upon it...

— Cudworth, Ralph (1617-1688)

Date: 1731

"So if the Knowledge of Corporeal Things were but a Secondary and Derivative Result from Sense, (though it cannot be conceived that the Passion of Sense should ray upon the Intellect, so as to beget a Secondary Passion there, any more than one Shadow should cast another) then Knowledge would be m...

— Cudworth, Ralph (1617-1688)