“The man of science has learned to believe in justification, not by faith, but by verification.”
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If a man cannot do brain work without stimulants of any kind, he had better turn to hand work it is an indication on Nature's part that she did not mean him to be a head worker.
The great thing in the world is not so much to seek happiness as to earn peace and self-respect.
History warns us that it is the customary fate of new truths to begin as heresies and to end as superstitions.
In science, as in art, and, as I believe, in every other sphere of human activity, there may be wisdom in a multitude of counsellors, but it is only in one or two of them.