Although psychoanalysis began as a tool for ameliorating emotional suffering, it is not only a therapy. It is, in addition, a method for learning about the mind, and also a theory, a way of understanding the processes of normal everyday mental functioning and the stages of normal development from infancy to old age. Furthermore, since psychoanalysis seeks to explain how the human mind works, it contributes insight into whatever the human mind produces. In so doing, it has had a profound influence on many aspects of twentieth-century culture.
As a general theory of individual human behavior and experience, psychoanalytic ideas enrich and are enriched by the study of the biological and social sciences, group behavior, history, philosophy, art, and literature. As a developmental theory, psychoanalysis contributes to child psychology, education, law, and family studies. Through its examination of the complex relationship between body and mind, psychoanalysis also furthers our understanding of the role of emotions in health as well as in medical illness.
In addition, psychoanalytic knowledge is the basis of all other dynamic approaches to therapy. Whatever the modifications, the insights of psychoanalysis form the underpinnings of much of the psychotherapy employed in general psychiatric practice, in child psychiatry, and in most other individual, family, and group therapies.