Psychoanalysis points out the existence of psychic reality which possesses characteristics of both, consistence and resistance, similar to the material reality. Similar to the way we conclude about material reality on the basis of perception, we conclude about psychic reality on the basis of self-perception. Or more precisely, psychoanalysis makes conclusions on the basis of interpretation of the fantasies on unconscious wishes and psychic mechanisms that exist at the background. Dream work is part of psychic reality which, through primary process, leads an unconscious wish to a wish fulfillment. Manifest dream picture as a wish fulfillment corresponds to a hallucinatory reproduction of an object perception, over which satisfaction of an urge has already been completed. Apart from the dream work, Sandler also postulates the perception work, which is directed toward revealing of material reality. Perception work is ruled according to the principle of reality, while the dream work is ruled according to the principle of satisfaction. Thanks to the perception work, Ego gets stronger as an instance of personality, while the process of integration develops simultaneously, contributing to the state of well-being. In that way Ego is capable to separate partially from the sphere of urges and to rule over the reality, both material (organic) and psychical one. Perception work and relative autonomy of Ego are preconditions for awareness of both material and psychical reality.