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The sun, with all the planets revolving around it, and depending on it, can still ripen a bunch of grapes as though it had nothing else in the univers...more

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Where the senses fail us, reason must step in.

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Measure what can be measured, and make measurable what cannot be measured.

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(T)he increase of known truths stimulates the investigation, establishment, and growth of the arts.

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I think that in the discussion of natural problems we ought to begin not with the Scriptures, but with experiments and demonstrations.

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Philosophy [nature] is written in that great book which ever is before our eyes -- I mean the universe -- but we cannot understand it if we do not fir...more

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In questions of science, the authority of a thousand is not worth the humble reasoning of a single individual.

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By denying scientific principles, one may maintain any paradox.

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If I were again beginning my studies, I would follow the advice of Plato and start with mathematics.

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See now the power of truth; the same experiment which at first glance seemed to show one thing, when more carefully examined, assures us of the contra...more

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Surely it is a great thing to increase the numerous host of fixed stars previously visible to the unaided vision, adding countless more which have nev...more

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Names and attributes must be accommodated to the essence of things, and not the essence to the names, since things come first and names afterwards.

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I do not feel obliged to believe that the same God who has endowed us with sense, reason, and intellect has intended us to forgo their use.

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I have been in my bed for five weeks, oppressed with weakness and other infirmities from which my age, seventy four years, permits me not to hope rele...more