Consultant, expert witness, and teacher.

... we do not yet know all the basic laws: there is an expanding frontier of ignorance.

--Richard Feynman (1961), The Feynman Lectures on Physics.

The mathematics are not there for the joy of the analyst but because they are essential to the solution.

Karl Pearson, Notes on the History of Correlation (1920).

Whenever there is a simple error that most laymen fall for, there is always a slightly more sophisticated version of the same problem that experts fall for.

--Amos Tversky

It is largely because of lack of knowledge of what statistics is that the person untrained in it trusts himself with a tool quite as dangerous as any he may pick out from the whole armamentarium of scientific methodology.

--Edwin B. Wilson (1927), quoted in Stephen M. Stigler, The Seven Pillars of Statistical Wisdom.