This article is an introduction to the central ideas of Nicolas Abraham and Maria Torok. The author locates their work in the history of psychoanalytic thought. The Abraham and Torok thinking on trauma, symbol versus anasemia, introjection versus incorporation, endocryptic identification as well as woman's penis envy, are described as theoretical axes around the focal point constituted by the authors' specific concept of introjection; seen as the human mode of appropriation of the external world, which is crucial to the expansion of the ego through symbolization.