Date: 1817

"But he, the bard of every age and clime, / Of genius fruitful, ardent and sublime, / Who, from the glowing mint of fancy, pours / No spurious metal, fused from common ores, / But gold, to matchless purity refined, / And stamp'd with all the godhead in his mind."

— Gifford, William (1756-1826)

Date: 1817

"When some bright thought has darted through my brain: / Through all that day I've felt a greater pleasure / Than if I'd brought to light a hidden treasure."

— Keats, John (1795-1821)

Date: November 1824

"Surely it is no exaggeration to say that no external advantage is to be compared with that purification of the intellectual eye which gives us to contemplate the infinite wealth of the mental world, all the hoarded treasures of its primeval dynasties, all the shapeless ore of its yet unexplored ...

— Thomas Babington Macaulay, 1st Baron Macaulay (1800-1859)

Date: 1825

"Thus, when the fervid Passions cool, / And Judgement, late, begins to rule; / When Reason mounts her throne serene, / And social Friendship gilds the scene; / When man, of ripened powers possest, / Broods o'er the treasures of his breast; / Exults, in conscious worth elate, / Lord of himself--al...

— Barbauld, Anna Letitia [née Aikin] (1743-1825)

Date: 1833

"It was the coinage of the aged brain, / When sadness and the sense of loneliness / Oppress the weary heart!"

— Bowles, William Lisle (1762-1850)

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)