People often ask why we do not remember our former incarnations. I have often answered this question, which is like saying that because a four-year-old child cannot do arithmetic, human beings cannot do arithmetic. When the child reaches ten, he or she will be able to multiply with ease. It is the same with the soul. If it cannot remember our former incarnations today, the time will come when it will be able to do so. Then it will possess the same capacity initiates have.
This new development is happening today. There are numerous souls nowadays who are so far advanced that they are close to the moment of remembering their former incarnations, or at least the last one. A number of people are at the threshold of comprehensive memory, embracing life between birth and death as well as previous incarnations. Many people will remember their present incarnation when they are reborn in their next life. It is simply a question of how they remember. The anthroposophical movement is to help and guide people to remember in the right way.
Source: Rudolf Steiner – GA 117 – The Universal Human: Lecture One: Individuality and the Group-Soul – Munich, December 4, 1909
Translated by Gilbert Church