Material Time Derivative

Famous quotes containing the words material, time and/or derivative:

“The material was pure, and his art was pure; how could the result be other than wonderful?”
—Henry David Thoreau (1817–1862)

“The time comes when our hearts sink utterly;
When we remember Deirdre and her tale,
And that her lips are dust.”
—James Kenneth Stephens (1882–1950)

“Poor John Field!—I trust he does not read this, unless he will improve by it,—thinking to live by some derivative old-country mode in this primitive new country.... With his horizon all his own, yet he a poor man, born to be poor, with his inherited Irish poverty or poor life, his Adam’s grandmother and boggy ways, not to rise in this world, he nor his posterity, till their wading webbed bog-trotting feet get talaria to their heels.”
—Henry David Thoreau (1817–1862)