In this fully updated second edition, the author clearly introduces and assesses all of Freud's thought, focusing on those areas of philosophy on which Freud is acknowledged to have had a lasting impact. These include the philosophy of mind, free will and determinism, rationality, the nature of the self and subjectivity, and ethics and religion. He also considers some of the deeper issues and problems Freud engaged with, brilliantly illustrating their philosophical significance: human sexuality, the unconscious, dreams, and the theory of transference. The author's approach emphasizes the philosophical significance of Freud's fundamental rule - to say whatever comes to mind without censorship or inhibition. This binds psychoanalysis to the philosophical exploration of self-consciousness and truthfulness, as well as opening new paths of inquiry for moral psychology and ethics.The second edition includes a new Introduction and Conclusion. The text is revised throughout, including new sections on psychological structure and object relations and on Freud's critique of religion and morality.