Date: w. 1821, 1840

"The greatest poet even cannot say it; for the mind in creation is as a fading coal, which some invisible influence, like an inconstant wind, awakens to transitory brightness; this power arises from within, like the color of a flower which fades and changes as it is developed, and the conscious p...

— Shelley, Percy Bysshe (1792-1822)

Date: 1841

"It is the solar system of the mind."

— Marx, Karl (1818-1883)

Date: 1843

"Pleasure is like photography. What we take, in the presence of the beloved object, is merely a negative film; we develop it later, when we are at home and have once again found at our disposal that inner darkroom, the entrance to which is barred to us so long as we are with other people."

— Kierkegaard, Søren (1813-1855)

Date: w. btw. April and August, 1844

"Logic -- mind's coin of the realm, the speculative or mental value of man and nature -- its essence which has grown totally indifferent to all real determinateness, and hence unreal -- is alienated thinking, and therefore thinking which abstracts from nature and from real man: abstract thinking."

— Marx, Karl (1818-1883)

Date: December 1843-January 1844

"He freed the body from chains because he enchained the heart."

— Marx, Karl (1818-1883)

Date: December 1843-January 1844

"And once the lightning of thought has squarely struck this ingenuous soil of the people, the emancipation of the Germans into men will be accomplished."

— Marx, Karl (1818-1883)

Date: 1845

"No words, no tears, no prayers, from his gory victim, seemed to move his iron heart from its bloody purpose."

— Douglass, Frederick (1818-1895)

Date: 1845

"I have sometimes thought that the mere hearing of those songs would do more to impress some minds with the horrible character of slavery, than the reading of whole volumes of philosophy on the subject could do."

— Douglass, Frederick (1818-1895)

Date: 1845

"They told a tale of woe which was then altogether beyond my feeble comprehension; they were tones loud, long, and deep; they breathed the prayer and complaint of souls boiling over with the bitterest anguish."

— Douglass, Frederick (1818-1895)

Date: 1845

"Mr. Gore lived in St. Michael's, Talbot county, Maryland, when I left there; and if he is still alive, he very probably lives there now; and if so, he is now, as he was then, as highly esteemed and as much respected as though his guilty soul had not been stained with his brother's blood."

— Douglass, Frederick (1818-1895)