I attempt to spell out some important implications stemming from an understanding of core unconscious processes as manifestations of nondeclarative (ND) processes and contents (conditioned emotional and procedural memory). Their clinical manifestations form what psychoanalytic authors have usually conceptualized as mental processes and contents that present low levels of symbolization or mentalization. My main line of argumentation is based on the assumption that ND and declarative (D) processes are fundamentally heterogeneous and can't directly modify each other. From such a perspective, structural change consists in the modification of ND structures and is essentially brought about by therapeutic processes that have a direct impact on these ND structures. These ND structures are modified during analytic therapy by the simultaneous engagement of five broad “fronts”: 1) Building tolerance of painful emotions; 2) Acquiring emotionally positive memories of self with others; 3) Reducing self-invalidating and creating more self-enhancing mental procedures; 4) Reducing affect-avoiding procedures; 5) Expanding self-knowledge, which impacts ND structures by two simultaneous processes: a) the inhibitory effect of D structures on pathological ND structures and b) the guiding of automatization of mental procedures by D knowledge. A greater recognition of the importance of ND processes and contents would invite greater efforts at conceptualizing ND components of psychoanalytic treatment and at thinking about what is psychoanalytic about its dealing with ND processes. A consideration of ND structures suggests that a stance of “patient compassionate activity” on the therapist's part would be most conducive to therapeutic change. I argue that the ND unconscious described in the paper is the “invisible” unconscious behind the darkest components of the repetition compulsion prone id and, as such, it deserves to be conceptualized with more precision and clarity in psychoanalytic conceptualizations.