Sigmund Freud (1856-1939) is known around the world as the “Father of Psychoanalysis,” and for good reason. If anything, Freud’s first patient was himself. A sufferer of psychosomatic symptoms, Freud diagnosed himself as having a repressed antagonism against his father. From there, Freud began to build on his now famous concepts of the unconscious, infantile sexuality and repression. And of course, there’s his famous theory on the structure of the mind, which has made Id and Ego a commonly used part of the English lexicon.

In addition to all but creating a new field of science, Freud also contributed to entire industries. One of the first to try to analyze dreams, Freud’s work has led patients in search of psychological explanations for various physical and mental symptoms and phenomena. The Interpretation of Dreams is Sigmund Freud's best known work, focusing on his theory of the unconscious with respect to dream interpretation. To Freud, dreams represented the unconscious attempt to fulfill some sort of wish, either by resolving a conflict or bringing certain memories to the surface.

Carl Gustav Jung, the man who created analytical psychology both as a concept and as a practice, was a complicated person. He is also very difficult to understand, partly because so many of his personality traits seem to be contradictory and sometimes mutually exclusive.

Ferociously intelligent, he used rigorous scientific method to derive a completely new set of tools for understanding and healing the human mind, yet he also believed completely in telepathy, ESP, poltergeists, and precognitive dreams, and he was convinced that coincidences were not the result of chance but evidence of the ability of the human mind to manipulate the physical world.