For the theory-practice iteration to work, the scientist must be, as it were, mentally ambidextrous; fascinated equally on the one hand by possible meanings, theories, and tentative models to be induced from data and the practical reality of the real world, and on the other with the factual implications deducible from tentative theories, models and hypotheses.
George E. P. BoxStatisticians, like artists, have the bad habit of falling in love with their models.
George E. P. BoxTo find out what happens to a system when you interfere with it you have to interfere with it (not just passively observe it).
George E. P. Box