[Geometry of the "true self" (Winnicott). On a psychoanalytic Leibniz study by F. Eckstein in 1931].

A psychoanalytical study of Leibniz by F. Eckstein from the year 1931 serves as starting point to confront the theory of monad with the concept of self of Winnicott. The theory of monad has given a new structure to the concepts of unity and multiplicity in the history of European philosophy. Freud's "third step in the theory of instincts" may be understood as a variation of the philosophy unity and multiplicity and may be newly interpreted in context with the philosophy of Leibniz.