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; it may be the beginning of knowledge, but you have scarcely, in your thoughts, advanced to the state of Science, whatever the matter may be.


Fundamentals of atomic physics (1951), preface

Saul Dushman Quotes

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...

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...

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...

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...