Excerpts from Books and Wikipedia
"He had long been fascinated by his own dreams, believing they held a deep psychological significance. . . . Freud believed that human beings are governed by sexual passions, such as the Oedipus complex, which the conscious mind is but dimly aware." [Furtado: 1001 Days] "Freud stated that 'The interpretation of dreams is the royal road to a knowledge of the unconscious activities of the mind.'. . . Freud believed that dreams were picture-puzzles, and though they may appear nonsensical and worthless on the surface, through the process of interpretation they can form a 'poetical phrase of the greatest beauty and significance.'" [Wikipedia: The Interpretation of Dreams]