It is all too easy to make some plausible simplifying assumptions, do some elaborate mathematics that appear to give a rough fit with at least some experimental data, and think one has achieved something. The chance of such an approach doing anything useful, apart from soothing the theorist's ego, is rather small..

What Mad Pursuit: A Personal View of Scientific Discovery - Chapter 10 (pp. 113-114), Basic Books, Inc., Publishers. 1988