Conflict and compromise formation are central aspects of mental life. They
dispose to constant mental change. Limitations of knowability in psychoanal
ysis are inextricably connected with constant mental change-the latter some
times diminishing unknowability and sometimes exacerbating it. This paper e
xplores three kinds of unknowability in psychoanalysis and their relation t
o constant mental change. That relation clarifies to some degree the implic
ations of certain controversial proposals for change in psychoanalytic theo
ry, method, and technique.