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 meager and unsatisfactory kind: it may be the beginning of knowledge, but you have scarcely, in your thoughts, advanced to the stage of science.
Authentication Score 3
Thomson, William. "Electrical Units of Measurement." Institution of Civil Engineers. 3 May 1883. London, UK. Lecture.