The analyst's mistakes are an inevitable aspect of his conduct of psyc
hoanalysis. They result from the inherent uncertainties and ambiguitie
s of the analytic process itself, and from the continuing effect upon
analytic technique of the analyst's unresolved conflicts, as manifeste
d in countertransference attitudes and enactments. Variables of clinic
al experience, skill, and the vicissitudes of the analyst's life also
contribute to the susceptibility to error. When the analyst's mistakes
result from his active engagement in the psychoanalytic process, they
yield important clues for understanding clinical material as well as
present potential obstacles to analytic progress.