Date: 1851

"And so it happens that the person who reads a great deal—that is to say, almost the whole day, and recreates himself by spending the intervals in thoughtless diversion, gradually loses the ability to think for himself; just as a man who is always riding at last forgets how to walk."

— Schopenhauer, Arthur (1788-1860)

Date: August 6 and 20, 1859

"The jaded cart-horse of the commonplace bourgeois mind falters of course in confusion in front of the ditch separating substance from appearance, and cause from effect; but one should not ride carthorses if one intends to go coursing over the very rough ground of abstract reasoning."

— Engels, Friedrich (1820-1895)

Date: February 14, 1860

"But, in England, it is some subaltern spokesman, some worn-out place-hunter, some anonymous nonentity of a so-called Cabinet, that, relying on the donkey power of the Parliamentary mind and the bewildering evaporations of an anonymous press, without making any noise, without incurring any danger...

— Marx, Karl (1818-1883)

Date: 1867

"As the hart pants after fresh water, so pants his soul after money, the only wealth."

— Marx, Karl (1818-1883)