“Obviously one must hold oneself responsible for the evil impulses of one's dreams. In what other way can one deal with them? Unless the content of the dream rightly understood is inspired by alien spirits, it is part of my own being.”

Austrian physician and psychoanalyst of the late 19th and early 20th centuries, Freud is best known for founding psychoanalysis and exploring the unconscious mind through techniques like free association. His theories on the structure of personality—id, ego, and superego—and the role of early childhood experiences in shaping behavior remain foundational in psychology.