---
title: "2 Dynamics Quotes By Lord Kelvin"
description: "2 Dynamics quotes by Lord Kelvin. Plus more from Lord Kelvin and more Dynamics sayings from other authors."
image: "https://sms4smile.com/quotes/i/055/lord-kelvin-10819_absolutes_i-need-scarcely-say-that-the-beginning-a_1509228.png"
---

> [I need scarcely say that the beginning and maintenance of life on earth is absolutely and infinitely beyond the range of all sound speculation in dynamical science. The only contribution of dynamics to theoretical biology is absolute negation of automatic…](https://sms4smile.com/quotes/lord-kelvin/i-need-scarcely-say-that-the-beginning-and-maintenance-of-life-on/)

[Lord Kelvin](https://sms4smile.com/quotes/author/lord-kelvin/)

[Image](https://sms4smile.com/quotes/i/055/lord-kelvin-10819_absolutes_i-need-scarcely-say-that-the-beginning-a_1509228.png)

> [Ether is the only substance we are confident of in dynamics. One thing we are sure of and that is the reality and substantiality of the luminferous ether.](https://sms4smile.com/quotes/lord-kelvin/ether-is-the-only-substance-we-are-confident-of-in-dynamics-one-thing/)

[Lord Kelvin](https://sms4smile.com/quotes/author/lord-kelvin/)

[Image](https://sms4smile.com/quotes/i/e14/lord-kelvin-10819_dynamics_ether-is-the-only-substance-we-are-confi_1579491.png)

## More by Lord Kelvin

> [Christianity without the cross is nothing. The cross was the fitting close of a life of rejection, scorn and defeat. But in no true…](https://sms4smile.com/quotes/lord-kelvin/christianity-without-the-cross-is-nothing-the-cross-was-the-fitting/)

[Lord Kelvin](https://sms4smile.com/quotes/author/lord-kelvin/)

> [If you study science deep enough and long enough, it will force you to believe in God.](https://sms4smile.com/quotes/lord-kelvin/if-you-study-science-deep-enough-and-long-enough-it-will-force-you-to/)

[Lord Kelvin](https://sms4smile.com/quotes/author/lord-kelvin/)

> [When you are face to face with a difficulty, you are up against a discovery.](https://sms4smile.com/quotes/lord-kelvin/when-you-are-face-to-face-with-a-difficulty-you-are-up-against-a/)

[Lord Kelvin](https://sms4smile.com/quotes/author/lord-kelvin/)

> [If you can not measure it, you can not improve it.](https://sms4smile.com/quotes/lord-kelvin/if-you-can-not-measure-it-you-can-not-improve-it/)

[Lord Kelvin](https://sms4smile.com/quotes/author/lord-kelvin/)

> [I often say that when you can measure what you are speaking about, and express it in numbers, you know something about it; but…](https://sms4smile.com/quotes/lord-kelvin/i-often-say-that-when-you-can-measure-what-you-are-speaking-about-and/)

[Lord Kelvin](https://sms4smile.com/quotes/author/lord-kelvin/)

> [If you cannot measure it, then it is not science.](https://sms4smile.com/quotes/lord-kelvin/if-you-cannot-measure-it-then-it-is-not-science/)

[Lord Kelvin](https://sms4smile.com/quotes/author/lord-kelvin/)

> [Simplification of modes of proof is not merely an indication of advance in our knowledge of a subject, but is also the surest guarantee…](https://sms4smile.com/quotes/lord-kelvin/simplification-of-modes-of-proof-is-not-merely-an-indication-of/)

[Lord Kelvin](https://sms4smile.com/quotes/author/lord-kelvin/)

> [Quaternions came from Hamilton after his really good work had been done, and though beautifully ingenious, have been an unmixed evil to those who…](https://sms4smile.com/quotes/lord-kelvin/quaternions-came-from-hamilton-after-his-really-good-work-had-been/)

[Lord Kelvin](https://sms4smile.com/quotes/author/lord-kelvin/)

> [Do not imagine that mathematics is hard and crabbed, and repulsive to common sense. It is merely the etherealization of common sense.](https://sms4smile.com/quotes/lord-kelvin/do-not-imagine-that-mathematics-is-hard-and-crabbed-and-repulsive-to/)

[Lord Kelvin](https://sms4smile.com/quotes/author/lord-kelvin/)

> [Let nobody be afraid of true freedom of thought. Let us be free in thought and criticism; but, with freedom, we are bound to…](https://sms4smile.com/quotes/lord-kelvin/let-nobody-be-afraid-of-true-freedom-of-thought-let-us-be-free-in/)

[Lord Kelvin](https://sms4smile.com/quotes/author/lord-kelvin/)

> [Symmetrical equations are good in their place, but ' vector ' is a useless survival, or offshoot from quaternions, and has never been of…](https://sms4smile.com/quotes/lord-kelvin/symmetrical-equations-are-good-in-their-place-but-vector-is-a-useless/)

[Lord Kelvin](https://sms4smile.com/quotes/author/lord-kelvin/)

> [Mathematics is the only good metaphysics.](https://sms4smile.com/quotes/lord-kelvin/mathematics-is-the-only-good-metaphysics/)

[Lord Kelvin](https://sms4smile.com/quotes/author/lord-kelvin/)

> [You know only insofar as you can measure.](https://sms4smile.com/quotes/lord-kelvin/you-know-only-insofar-as-you-can-measure/)

[Lord Kelvin](https://sms4smile.com/quotes/author/lord-kelvin/)

> [Fourier is a mathematical poem.](https://sms4smile.com/quotes/lord-kelvin/fourier-is-a-mathematical-poem/)

[Lord Kelvin](https://sms4smile.com/quotes/author/lord-kelvin/)

> [When you can measure what you are speaking about, and express it in numbers, you know something about it.](https://sms4smile.com/quotes/lord-kelvin/when-you-can-measure-what-you-are-speaking-about-and-express-it-in/)

[Lord Kelvin](https://sms4smile.com/quotes/author/lord-kelvin/)

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