• There are some modern practitioners, who declaim against medical theory in general, not considering that to think is to theorize; and that no one can direct a method of cure to a person labouring under disease, without thinking, that is, without theorizing; and happy therefore is the patient, whose physician possesses the best theory.

    Erasmus Darwin, Robert Waring Darwin (1794). “Zoonomia; or, The laws of organic life ...”, p.2