The Collected Papers of Otto FenichelThese significant essays, as Dr. Bertram D. Lewin says in his introduction to the First Series, explore many subjects that were only touched on in his books. Many of these discussions, present day classics in their fields, are comprehensive monographs in themselves. Often so much is brought to bear on the central topics from so many sources, and then related so clearly to the context, that these essays become works of reference for a much larger