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.

—William Thomson, Lord Kelvin

]]>“Ubi materia, ibi geometeria” – Kepler

]]>be understood unless one first learns to comprehend the

language… in which it is written. It is written in the

language of mathematics