Melanie Klein — Austrian Psychologist born on March 30, 1882, died on September 22, 1960

Melanie Reizes Klein was an Austrian-British psychoanalyst who devised novel therapeutic techniques for children that had an impact on child psychology and contemporary psychoanalysis. She was a leading innovator in theorizing object relations theory... (wikipedia)

One of the many interesting and surprising experiences of the beginner in child analysis is to find in even very young children a capacity for insight which is often far greater than that of adults.
My psycho-analytic work has convinced me that when in the baby's mind the conflicts between love and hate arise, and the fears of losing the loved one become active, a very important step is made in development.