Date: 1654

"We often see stones hang with drops not from any innate moisture, but from a thick air about them; so may we sometime see marble-hearted sinners seem full of contrition, but it is not from any dew of grace within but from some black clouds that impends them, which produces these sweating effects."

— Bradstreet, Anne (1612-1672)

Date: 1787

"They will not always expertly distinguish the several species of geniuses, the golden, the silver, the brazen, and the iron."

— Adams, John (1735-1826)

Date: w. 1796, 1799

"My soul was held up by the power of God, as the needle by the loadstone, and I did by faith, with joy draw water out of these wells of salvation."

— Osborn, Sarah (1714-1796)

Date: w. c. 1800, 1805

"These sudden eruptions of the passions of the multitude, spread, like the lava of a volcano, throughout all France, nor could men of correct judgment, who aimed only at reform of abuses, and a renovation in all the departments, check the fury of the torrent."

— Warren, Mercy Otis (1728-1814)

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

"Under its influence, the tender heart became stone, and the lamblike disposition gave way to one of tiger-like fierceness."

— Douglass, Frederick (1818-1895)

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: 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)