Date: December 1840

"Perhaps a friendly Morgan le Fay will make Siegfried's castle rise again for me or show my mind's eye what heroic deeds are reserved for his sons of the nineteenth century."

— Engels, Friedrich (1820-1895)

Date: 1841

"It is the solar system of the mind."

— Marx, Karl (1818-1883)

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)