The art of concluding from experience and observation consists in evaluating probabilities, in estimating if they are high or numerous enough to constitute proof.
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"I have lived long enough to be certain that the world will not be ready for my discoveries until at least a hundred years after my death."
"The chemist, in his laboratory, is a magician who creates new substances."
"The imagination is a dangerous guide in science, but it can be a useful servant."
"The greatest pleasure of the human mind is to discover the truth."
"The chemist, like the artist, must have a vivid imagination, but it must be controlled by reason."
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