When he looks back upon the long series of earth lives which belongs to his past, he is struck afresh by the supreme wisdom of Nature and by the supreme necessity of this principle of recurring embodiment. If there had been only one single continuous earth life, his progress would have been brought to an end, he would have been cluttered up by his own past, and he could not have advanced in new directions. This past would have surrounded him like a circular wall. How unerring the wisdom and how infinite the mercy which, by breaking this circle of necessity, gives him the chance of a fresh start again and again, sets him free to make new beginnings! Without these breaks in his life-sequences, without the advantages of fresh surroundings, different circumstances, and new contacts, he could not have lifted himself to ever higher levels, but would only have stagnated or fallen to lower ones.
-- Notebooks Category 9: From Birth to Rebirth > Chapter 2: Rebirth and Reincarnation > # 160
-- Perspectives > Chapter 9: From Birth to Rebirth > # 33