All our provisional ideas in psychology will presumably some day be based on an organic substructure.

No one is fitted to begin the materialistic study of the brain unless he has a good knowledge of psychology.

Because psychoanalysis won't oblige its critics by simply going away, every major new development in the behavioral sciences has found itself sooner or later compelled to profer a synthesis or rapproachment between itself and Freud's venerable body of theory and clinical lore.