Sigmund Freud's landmark work The Interpretation of Dreams forever changed the way we think about our dreams. It is here that Freud made many of his most important discoveries about the subconscious mind, as he explored why we dream, what we dream, and what our dreams mean. What does it symbolize when we fly in our dreams? When we fall?

Freud's dream analysis proved particularly valuable in his treatment of abnormal mental states. He claimed that dreams not only reveal the cryptic mechanisms of phobias, obsessions, and delusions but are also the most potent weapon in the healing of them. It is through our dreams that the unconscious mind strives to resolve conflict.