In this fully revised and updated second edition, Jonathan Lear 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. In this new edition Lear 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. One of the most important introductions and contributions to understanding this great thinker to have been published for many years, Freud, second edition will be essential reading for anyone in the humanities, social sciences and beyond with an interest in Freud or philosophy.