Everyone knows psychological pain from her own experience. It affects us when we feel rejected, excluded from a group, part with important to us people, when we suffer the loss of something or someone dear etc. It seems obvious that a lot of suffering we experience within our inner world is a result of the events in the external world. But it is not always the case; it is sometimes difficult to find an external cause for psychological problems. We are not always aware how many problems in the external world, particularly in our relations with other people have their source in our own mind, how often we fall victim to what Freud termed the repetition compulsion. Our inner world, our mental life consists of our emotions, thoughts, and moods.