In this presentation I consider whether the importance of Spirit in Liber Novus may render the task of its clinical application peculiarly problematic. Freud's experimentation on himself is briefly compared with Jung's self-experimentation of which Liber Novus is the record. Taking up the theme of the vas from Gaillard's paper, I refer to Jung's two major contributions to the elaboration of the Freudian frame: the necessity for the analyst to have been analysed, and the positive value of countertransference. In an epilogue, I briefly discuss a dream related to the preparation of this report for publication, emphasizing the theme of the disturbing effects of Spirit as a key theme both in Liber Novus itself and in any attempt to assimilate it on the part of the contemporary analyst.