They measure things, that are only parts of Life. We can't live Life without mathematics and logic. So there you see how fragile measuring is. Aristotle stays on the ground. Don't you see, my beloved slave.
Life is built up by contrary terms.
That's why we need to measure. Life built only on logic and measurements would be as empty as a non-existing universe. Measuring can never ever fill up a universe with anything. It only sets up frontiers, so it is our task to open the almost invisible doors in these frontiers. We'll find the fairy tale of Life - you can count the words and the letters in the fairy tale, but it doesn't mean anything.