At the core of the change process in the therapeutic community (TC) is the relationship between the individual and the community. Internalization is a familiar psychodynamic concept connoting learning that involves “taking in” the behavior and teachings of others. In the TC, internalization is evident when new learning becomes a “natural” part of the individual’s repertoire. In the TC internalization is inferred from patterns of behavioral, experiential, and perceptual change occurring over time. These may be described in terms of several broad characteristics: cognitive dissonance and behavioral conflict, generalization, learning to learn, and confirmatory experiences. The course of internalization can be characterized as a gradient that depicts changing levels or stages of internalization. Four stages refer to changes during treatment, compliance, conformity, commitment to program, and commitment to self. A change in identity is the distinctive marker of the integration stage.