This book brings together 21 key essays by Donald Woods Winnicott, which illustrate the wide range of his thought and enrich its understanding. The file opens with a seminal article that describes the empathetic listening of the pediatrician Winnicott to the inner world of babies who have not yet begun to speak, through precise and patient attention to their spontaneous gestures and the beginning of the ability to play, which in his eyes was a central aspect of mental health. In the last part, articles published only after Winnicott's death are presented, in which they develop the idea of ??using an object - this innovative idea was initially met with reservations, but today it is seen as a cornerstone in the understanding of emotional development. Although decades have passed since Winnicott's death, he continues to be a major source of inspiration in the fields of psychotherapy and psychoanalysis. His original thinking, his creative writing, his influential formulations continue to fascinate the therapeutic community and many readers. Winnicott emphasizes that each therapist must find his personal voice, understand the patient in his unique way and not based on generalizations, recognize his own failings and use them.