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When you can measure what you are speaking about, and express it in numbers, you know something about it.

Lord Kelvin

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Lord Kelvin
Age: 83 †
Born: 1824
Born: June 26
Died: 1907
Died: December 17
Astronomer
Mathematician
Physicist
Politician
Scientist
University Teacher
Belfast
Ireland
The Lord Kelvin
Lord Kelvin
William Thomson
William (Lord Kelvin) Thomson
Numbers
Science
Something
Measurement
Math
Measure
Speaking
Express
Mathematics

More quotes by Lord Kelvin

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Vortices of pure energy can exist and, if my theories are right, can compose the bodily form of an intelligent species.
Lord Kelvin
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I have not the smallest molecule of faith in aerial navigation other than ballooning, or of the expectation of good results from any of the trials we heard of. So you will understand that I would not care to be a member of the Aeronautical Society.
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Fourier is a mathematical poem.
Lord Kelvin
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Symmetrical equations are good in their place, but ' vector ' is a useless survival, or offshoot from quaternions, and has never been of the slightest use to any creature.
Lord Kelvin
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The vortex theory [of the atom] is only a dream. Itself unproven, it can prove nothing, and any speculations founded upon it are mere dreams about dreams.
Lord Kelvin
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[Of the ether] it is no greater mystery at all events than the shoemakers' wax.
Lord Kelvin
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I often say that when you can measure what you are speaking about, and express it in numbers, you know something about it but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind.
Lord Kelvin
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I have no satisfaction in formulas unless I feel their numerical magnitude.
Lord Kelvin
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When you cannot measure, your knowledge is meager and unsatisfactory.
Lord Kelvin
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I believe that the more thoroughly science is studied, the further does it take us from anything comparable to atheism.
Lord Kelvin
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Mathematics is the only true metaphysics.
Lord Kelvin
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Questions of personal priority, however interesting they may be to the persons concerned, sink into insignificance in the prospect of any gain of deeper insight into the secrets of nature.
Lord Kelvin
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I can never satisfy myself until I can make a mechanical model of a thing. If I can make a mechanical model, I can understand it. As long as I cannot make a mechanical model all the way through I cannot understand.
Lord Kelvin
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You know only insofar as you can measure.
Lord Kelvin
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To measure is to know.
Lord Kelvin
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Overwhelmingly strong proofs of intelligent and benevolent design lie around us... the atheistic idea is so nonsensical that I cannot put it into words.
Lord Kelvin
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There cannot be a greater mistake than that of looking superciliously upon practical applications of science. The life and soul of science is its practical application.
Lord Kelvin
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Can you measure it? Can you express it in figures? Can you make a model of it? If not, your theory is apt to be based more upon imagination than upon knowledge.
Lord Kelvin
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Suppose that you could mark the molecules in a glass of water then pour the contents of the glass into the ocean and stir the latter throughly so as to distribute the marked molecules uniformly throughout the seven seas if then you took a glass of water anywhere out of the ocean, you would find in it about a hundred of your marked molecules.
Lord Kelvin
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If we can't express what we know in the form of numbers, we really don't know much about it.
Lord Kelvin