What did Sigmund Freud suggest in his book The Interpretation of Dreams?
Thoughts must originate in both the id and the superego.
The conscious level of awareness is the tip of the iceberg, and just below the surface are the subconscious and the unconscious.
Dreams result from inconsequential superstitions and have to be "worked through" for analysis to succeed.
People are in control of their own dreams and can consciously choose to steer them in one direction or another.