As a great man's influence never ends, so also there is not definite finality, no end, to a great survey; it runs along for centuries, ever responsive to the strain of the increasing needs of a growing population and an enlarging domain.
It is inevitable that those to whom is vouchsafed a long life of usefulness should outlive the friends of their youth.
My boyhood life in New York City has impressed me with the popular ignorance and also with the great need of something better than local lore and weather proverbs.
True science is never speculative; it employs hypotheses as suggesting points for inquiry, but it never adopts the hypotheses as though they were demonstrated propositions.
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