http://www.lacan.com/zizplato.htm
Freud's famous motto "what we do not remember, we are compelled to repeat" should thus be turned around: what we are unable to repeat, we are haunted with and are compelled to memorize. The way to get rid of a past trauma is not to rememorize it, but to fully REPEAT it in the Kierkegaardian sense.

http://nosubject.com/Jouissance
Lacan makes an important distinction between jouissance and plaisir (pleasure). Pleasure obeys the law of homeostasis that Freud evokes in Beyond the Pleasure Principle, whereby, through discharge, the psyche seeks the lowest possible level of tension. The pleasure principle thus functions as a limit imposed on enjoyment; it commands the subject to "enjoy as little as possible." Jouissance transgresses this law and, in that respect, it is beyond the pleasure principle.