Lacan's discussion of the ethics of psychoanalysis is closely connected to his discussion of tragedy, yet one must not forget that this connection is not an immediate one. Ethics, as well as tragedy, is approached in relation to another central notion, that of desire. Whatever link there is between ethics and tragedy, it springs from this notion. One should also bear in mind that, in Lacanian theory, there is a very direct link between desire and comedy. Lacan introduces, develops, and illustrates his famous graph of desire through his reading of Freud's book on the Witz (Jokes and their Relation to the Unconscious), adding some of his own examples and bringing the discussion to its climax with a brief but poignant commentary on Aristophanes and Molière. At the end of the Ethics of Psychoanalysis, the seminar in which the central question of the relationship between action and the desire that inhabits us is explored in its tragic dimension, Lacan reminds us again of this other, comic dimension: