Date: 1845

"I then presented an appearance enough to affect any but a heart of iron."

— Douglass, Frederick (1818-1895)

Date: 1854

"They love the soil which makes their graves, but have no sympathy with the spirit which may still animate their clay."

— Henry David Thoreau (1817-1862)

Date: 1901-2, 1902

"It is as if a bar of iron, without touch or sight, with no representative faculty whatever, might nevertheless be strongly endowed with an inner capacity for magnetic feeling; and as if, through the various arousals of its magnetism by magnets coming and going in its neighborhood, it might be co...

— James, William (1842-1910)

Date: 1901-2, 1902

"We must class him, like Bunyan and Tolstoy, amongst those upon whose soul the iron of melancholy left a permanent imprint."

— James, William (1842-1910)

Date: 1902

"If it were otherwise, no one could even set down on paper a closely reasoned argument, for the attention would be skipping like a stone hurrying down a sharp incline, or it would be moving hither and thither like a helpless shuttlecock at the mercy of eager players."

— Spiller, Gustav (1864-1940)

Date: 1911

"I shall here have to change my metaphor a little to get the process in his mind. Suppose that instead of your curved pieces of wood you have a springy piece of steel of the same types of curvature as the wood. Now the state of tension or concentration of mind, if he is doing anything really good...

— Hulme, T. E. (1883-1917)

Date: 1911

" I have no material clay to mould to the given shape; the only thing which one has for the purpose, and which acts as a substitute for it, a kind of mental clay, are certain metaphors modified into theories of aesthetic and rhetoric."

— Hulme, T. E. (1883-1917)

Date: 1922

"When the two gases previously mentioned are mixed in the presence of a filament of platinum, they form sulphurous acid. This combination takes place only if the platinum is present; nevertheless the newly formed acid contains no trace of platinum, and the platinum itself is apparently unaffected...

— Eliot, T. S. (1888-1965)

Date: February 8, 1996

"These laws would declare ideas to be another industrial product, no more noble than pig iron."

— Barlow, John Perry (b. 1947)

Date: 2001

"Pebble, question, soul: no one can see all sides at once, but there is no side that cannot be seen."

— Richardson, James (b. 1950)