Ideal Program of Training for Psychotherapists: Patterns of Institutional Sponsorship [1969]

Had he known the psychology of today, he would have said, "The tent of psychology should be large enough to provide a place for the Bohemian and clinical speculations of a Freud, or the rigorous physiological methods of a Lashley, or the bold theoretical generalizations of a Kohler, or the useful statistical technique of a Spearman. Only time will tell which of these, or whether any of these, will yield the master hypothesis which will give to psychology that explanatory and predictive power, that control of the forces of nature, which has been achieved by the older sciences."