Date: 1733

"May not the sentient Principle have its Seat in some Place in the Brain, where the Nerves terminate, like the Musician shut up in his Organ-Room? May not the infinite Windings, Convolutions, and Complications of the Beginning of the Nerves which constitute the Brain, serve to d...

— Cheyne, George (1671-1743)

Date: 1734

"How shall the Wheel of the Imagination that's continually in motion, be either stop'd or regulated?"

— Forbes of Pitsligo, Alexander Forbes, Lord (1678-1762)

Date: January 1739

"For such is the unsteadiness and activity of thought, that the images of every thing, especially of goods and evils, are always wandering in the mind; and were it mov'd by every idle conception of this kind, it would never enjoy a moment's peace and tranquillity."

— Hume, David (1711-1776)

Date: January 1739

"The vividness of the first conception diffuses itself along the relations, and is convey'd, as by so many pipes or canals, to every idea that has any communication with the primary one."

— Hume, David (1711-1776)

Date: January 1739

"The attention is on the stretch; the posture of the mind is uneasy; and the spirits being diverted from their natural course, are not governed in their movements by the same laws, at least not to the same degree, as when they flow in their usual channel."

— Hume, David (1711-1776)

Date: January 1739

"I have already observed, in examining the foundation of mathematics, that the imagination, when set into any train of thinking, is apt to continue even when its object fails it, and, like a galley put in motion by the oars, carries on its course without any new impulse."

— Hume, David (1711-1776)

Date: January 1739

"The thought slides along the succession with equal facility, as if it consider'd only one object; and therefore confounds the succession with the identity."

— Hume, David (1711-1776)

Date: 1742, 1777

"The heart, mean while, is empty of all enjoyment: And the mind, unsupported by its proper objects, sinks into the deepest sorrow and dejection."

— Hume, David (1711-1776)

Date: 1748, 1754

"But when [the mind] soars above mortal Cares and mortal Pursuits, into the Regions of Divinity, and converses with the greatest and best of Beings, it spreads itself into a wider Compass, takes higher Flights in Reason and Goodness, and becomes God-like in its Air and Manners."

— Fordyce, David (bap. 1711, d. 1751)

Date: 1751

"Mankind would be in a perpetual reverie; ideas would be constantly floating in the mind; and no man be able to connect his ideas with himself."

— Home, Henry, Lord Kames (1696-1782)