Aztec psychological thought is described in this paper. The Pre-Columbian world of the Aztecs was characterized by Spanish chroniclers as being as sophisticated in the sciences and medicine as anything found in Europe at the time of the conquest of Mexico. This knowledge included a belief structure about the development of personality and the way in which Aztec society socialized the person. Concepts of psychological equilibrium and well-being are also found within Aztec medicine. Psychological dysfunctions were identified by Aztec healers and "talking" therapies not unlike today's psychotherapeutic techniques could be found.