Famous quotes containing the words effective and/or theories:
“[Humanity] has unquestionably one really effective weaponlaughter. Power, money, persuasion, supplication, persecutionthese can lift at a colossal humbugpush it a littleweaken it a little, century by century; but only laughter can blow it to rags and atoms at a blast. Against the assault of laughter nothing can stand.”
—Mark Twain [Samuel Langhorne Clemens] (18351910)
“Our books of science, as they improve in accuracy, are in danger of losing the freshness and vigor and readiness to appreciate the real laws of Nature, which is a marked merit in the ofttimes false theories of the ancients.”
—Henry David Thoreau (18171862)
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