You Know Only Insofar As You Can

If You Can Not Measure It, You Can Not Improve It.

I Have Not Had A Moment's Peace Or Happiness In Respect To Electromagnetic Theory Since November 28, 1846. All This Time I Have Been Liable To Fits Of Ether Dipsomania, Kept Away At Intervals Only By Rigorous Abstention From Thought On The Subject.

Science Is Bound, By The Everlasting Vow Of Honour, To Face Fearlessly Every Problem Which Can Be Fairly Presented To It.

When You Can Measure What You Are Speaking About, And Express It In Numbers, You Know Something About It.

Fourier's Theorem Is Not Only One Of The Most Beautiful Results Of Modern Analysis, But It May Be Said To Furnish An Indispensable Instrument In The Treatment Of Nearly Every Recondite Question In Modern Physics.