Date: w. 1821, 1840

"For Lucretius had limed the wings of his swift spirit in the dregs of the sensible world."

— Shelley, Percy Bysshe (1792-1822)

Date: w. 1821, 1840

"What were virtue, love, patriotism, friendship - what were the scenery of this beautiful universe which we inhabit; what were our consolations on this side of the grave - and what were our aspirations beyond it, if poetry did not ascend to bring light and fire from those eternal regions where th...

— Shelley, Percy Bysshe (1792-1822)

Date: 1914

"I think with all his purity Emerson had within him the turbid stream of passion and desire; for all his hard-cut granite features he knew the instincts of the weakling and the slave; and for all his sweetness, he had the tiger and the jackal in his soul."

— de Cleyre, Voltairine (1866-1912)

Date: September 2, 2011

"We speak of exerting will power, of forcing ourselves to go to work, of restraining ourselves and of controlling our temper, as if it were an unruly dog."

— Pinker, Steven (b. 1954)