For me, the word "infant" has always had a strange and compelling fascination. This book, in essence, represents the first step of what I hope will be a long and fruitful journey into the mysteries of the infant psyche, with special emphasis on the phenomenon of early-life depressive symptomatology. From the outset of my medical training, I was particularly attracted to the field of psychiatry. As a resident exposed to adult patients in a psychiatric ward, I can vividly recall, even these many years later, the deep sense of poignancy and distress while in the presence of minds gone awry. It is my belief that psy­ chiatry, more than any other branch of medicine, presents the physician with the ultimate paradox-the elusive diagnosis. By this I mean that while the symp­ tomatology of psychiatry may be classified and analyzed, while diagnoses, prog­ noses, and treatment schedules can be devised, within psychiatry the unique configuration of each individual patient emerges with a clarity and distinction unparalleled in any other medical field. Before any psychiatric diagnosis can be formulated, the therapist must first delve deeply into the ultimate singularity of the patient. As a consequence, psychiatry is, in the final analysis, concerned with the dignity of each patient, and the psychiatrist is continually challenged to explore the most formidable and elaborate aspect of each person-the human mind. That said, I need to express the reasons for my dedication to child psychiatry.