Date: 1773

"Whenever the operations of the soul are well performed, and the soul acts with entire liberty, the blood flows with moderate velocity; on the contrary, it circulates with great rapidity in frenzies, in strong agitations of the mind, and when the lamp of wisdom is extinct."

— Marat, Jean-Paul (1743-1793)

Date: 1774

"While a man is engaged in composition or investigation, he often seems to himself to be fired with his subject, and to teem with ideas; but on revising the work, finds that his judgment is offended, and his time lost. An idea that sparkled in the eye of fancy, is often condemned by judgment as f...

— Gerard, Alexander (1728-1795)

Date: 1774

"Penetration implies such a force of imagination as leads to the comprehension and explication of a subject: brightness of imagination fits a man for adorning a subject. A penetrating mind emits the rays by which truth is discovered: a bright fancy supplies the colours by which beauty is produced."

— Gerard, Alexander (1728-1795)

Date: 1774

"A learned parson, rusting in his cell, at Oxford or Cambridge, will reason admirably well upon the nature of man; will profoundly analyze the head, the heart, the reason, the will, the passions, the senses, the sentiments, and all those subdivisions of we know not what; and yet, unfortunately, h...

— Stanhope, Philip Dormer, fourth earl of Chesterfield (1694-1773)

Date: 1776

"The lights of the mind are, if I may so express myself, in an opposite situation to the lights of the body."

— Campbell, George (1719-1796)

Date: 1776

"By the memory, on the contrary, that great luminary of the mind, things past are exhibited in retrospect; we have no correspondent faculty to irradiate the future: and even in matters which fall not within the reach of our memory, past events are often clearly discoverable by testimony, and by e...

— Campbell, George (1719-1796)

Date: April, 1778

"Cicero, upon whose mind the advancing rays of celestial philosophy beamed with a brightness very admirable in a Pagan period of time, before the Sun of Righteousness arose, and shone forth in full splendour upon the world, informs us, in his Tusculan Questions, of a very remarkable interview bet...

— Boswell, James (1740-1795)

Date: 1779, 1781

"The variable weather of the mind, the flying vapours of incipient madness, which from time to time cloud reason, without eclipsing it, it requires so much nicety to exhibit, that Addison seems to have been deterred from prosecuting his own design."

— Johnson, Samuel (1709-1784)

Date: 1781

"He proceeded throughout his life to tread the same steps on the same circle; always applauding his past conduct, or at least forgetting it, to amuse himself with phantoms of happiness which were dancing before him, and willingly turned his eyes from the light of reason, when it would have discov...

— Johnson, Samuel (1709-1784)

Date: 1782

"I read it carefully a second time--pondered--weighed--and submitted--whenever a spark of vanity seems to be glowing at my heart--I will read your letter--and what then?"

— Sancho, Charles Ignatius (1729-1780)