This is a valuable discussion of the therapeutic process in psychotherapy (including psycho-analytic therapy) in which an attempt is made to clarify the meaning of insight. The authors conclude: 'With increased concern, on the part of serious workers, to record full interview materials, with the logical analysis of such materials and the consequent formulation of testable hypotheses about the relative efficacy of different forms of psychotherapy, with more critical questioning of assumptions and methods and less dogmatic theorizing about issues naively interpreted in an all-or-none fashion, with such advances in data gathering, logical thinking, and hypothesis testing, we may reasonably look forward to a time, in the not too distant future, when we can really answer the question, what is the rôle of insight in psychotherapy?'