Geheimnisse einer Seele (Secrets of a Soul)

Possibly the first film to depict dreams and Freudian psychoanalysis, this silent film is an expressionist masterpiece full of distorting lenses, superimpositions and special effects.
A professor is driven into a state of terror by a dream in which he attempts to stab his wife. He finds it impossible to touch a knife because it always reminds him of the dagger that he drove in his wife’s neck in his dreams. His wife is considerably upset by her husband's behaviour. Finally his mother shows him the way to a doctor who reawakens his memory of a suppressed childhood experience. Now with the knowledge of his subconscious jealousy and fear, the professor can control himself.