Concerning.
When you can measure what you are speaking about, and express it in numbers, you know something about 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 scarely, in your thoughts advanced to the stage of science.
Kelvin
A critical thought about the importance of quantification in science; but recognizing that this doesn't take into account the importance of qualitative methodologies too.