"Behold the turtle. He makes progress only when he sticks his neck out."
"The stumbling way in which even the ablest of the scientists in every generation have had to fight through thickets of erroneous observations, misleading generalizations, inadequate formulation, and unconscious prejudice is rarely appreciated by those who obtain their scientific knowledge from textbooks."
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Source: Diary as freshman at Harvard College (1910 - 1911)
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