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: 1791

"I compared him at this time to a warm West-Indian climate, where you have a bright sun, quick vegetation, luxuriant foliage, luscious fruits; but where the same heat sometimes produces thunder, lightening, and earthquakes in a terrible degree.

— Boswell, James (1740-1795)

Date: 1792

"For it is the right use of reason alone which makes us independent of everything--excepting the unclouded reason--'Whose service is perfect freedom.'"

— Wollstonecraft, Mary (1759-1797)

Date: 1796

"Thus he restored his plastic mind to its usual satisfaction, and arose the next morning without a cloud upon his brow."

— Burney [married name D'Arblay], Frances (1752-1840)

Date: September 10, 1836

"And the blue sky in which the private earth is buried, the sky with its eternal calm, and full of everlasting orbs, is the type of Reason."

— Emerson, Ralph Waldo (1803-1882)

Date: w. 1821, 1840

"It is as it were the interpretation of a diviner nature through our own; but its footsteps are like those of a wind over the sea, which the coming calm erases, and whose traces remain only as on the wrinkled sand which paves it."

— Shelley, Percy Bysshe (1792-1822)