Date: 1651, 1668

"And on the contrary, metaphors, and senseless and ambiguous words, are like ignes fatui; and reasoning upon them is wandering amongst innumerable absurdities; and their end, contention and sedition, or contempt."

— Hobbes, Thomas (1588-1679)

Date: 1690, 1694, 1695, 1700, 1706

"GOD I own cannot be denied to enlighten the Understanding by a Ray darted into the Mind immediately from the Fountain of Light"

— Locke, John (1632-1704)

Date: 1691

"As the Eyes are the Windows to let in the Species of all exterior Objects into the dark Cels of the Brain, for the information of the Soul; so are they flaming Torches to reveal to those abroad how the Soul within is moved or affected."

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

Date: April 26, 1695; 1708

"Meditating by one's self is like digging in the Mine; it often, perhaps, brings up maiden Earth, which never came near the Light before; but whether it contain any Metal in it, is never so well tried as in Conversation with a knowing judicious Friend, who carries about him the true Touch-stone, ...

— Locke, John (1632-1704)

Date: 1759

"His mighty mind travelled round the intellectual world; and, with a more than eagle's eye, saw, and has pointed out blank spaces, or dark spots in it, on which the human mind never shone."

— Young, Edward (bap. 1683, d. 1765)

Date: 1777

"The philosophical doctrine of the slow recession of bodies from the sun, is a lively image of the reluctance with which we first abandon the light of virtue."

— More, Hannah (1745-1833)

Date: 1793

"It is curious to observe the first dawn of genius breaking on the mind. Sometimes a man of genius, in his first effusions, is so far from revealing his future powers, that, on the contrary, no reasonable hope can be formed of his success."

— Disraeli, Isaac (1766-1848)

Date: April, 1871

"Intensity. This is the main cause why the ideas that flash on the minds of seers, as in Scott's description, are believed; they come mostly when the nerves are exhausted by fasting, watching and longing; they have a peculiar brilliancy, and therefore they are believed."

— Bagehot, William (1826-1877)

Date: 2000

"The public situations that I have mentioned give rise to corresponding mental processes which are modeled on the public procedures, as a shadowy movement on a ceiling is modeled on an original physical movement on the floor."

— Hampshire, Stuart (1914-2004)