Consultant, expert witness, and teacher.
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.
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.