The attainment of this deep state of oneness in meditation by an ordinary mystic may seem to be the end of the quest. Nevertheless the cycle of reincarnation will not end for him until he has become a philosophical mystic. For even though all earthly desires have been given a quietus, there will remain a latent desire to know, to understand his own experience and the world experience. To satisfy this desire, which will slowly come to the surface under the compulsion of Nature, he will have to develop intelligence to the proper degree. If he cannot do it quickly enough, then the work will have to continue into as many other births as are needed to finish it. For nature is shepherding the human race not only along the road of spiritual evolution but also of intellectual evolution.
-- Notebooks Category 16: The Sensitives > Chapter 2: Phases of Mystical Development > # 250