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GENESIS THE MIRACLES AND THE PREDICTIONS ACCORDING TO SPIRITISM > GENESIS > Chapter XI - SPIRITUAL GENESIS > Union of Spiritual Principle with Matter > 12
12. As soon as the spirit is born into self-conscious life, it must for its advancement make use of its faculties, which are at first in a rudimentary state. That is why it is invested with a material envelope, appropriate to its state of intellectual infancy - an envelope which it quits in order to be reinvested with another suited to its enlarged forces. Now, as from all time worlds have existed, and as these worlds have given birth to organized bodies proper to be receptacle of Spirits, from all time Spirits have found what their degree of advancement was, and the necessary elements for their material life.