24. The necessity for the incarnated spirit to provide for the nourishment of the body, for its security and well-being, the constraint of applying its faculties in research, in exercising and developing them, renders its union with matter useful for its advancement; that is why incarnation is a necessity. Besides, by the intelligent work it accomplishes to its profit over matter, it aids in the transformation and material progress of the globe it inhabits; thus, by progressing itself, it concurs with the work of the Creator, of whom it is the agent.