The early months of the Kleinian analysis of a four-year-old child show in some detail his development from a paranoid to an obsessional organization. The movement is from the diffuse projection of violent parts of the self onto his objects with resulting extreme persecutory anxiety, through gradual focusing of the projections onto the inside of the mother's body (essentially the analyst), to beginning of an ability to introject. The parents were coöperative in the treatment but their behavior is not seen as playing any significant role in causation, nor is change in their behavior seen as contributing to the child's improvement.