11. In order to be more exact, it is necessary to say that it is the spirit itself which fashions its envelope, and appropriates it to its new needs. It brings it toward perfection, develops and completes the organism by measure as it experiences the need of manifesting new qualities. In a word, it makes him in accordance with his intelligence. God furnishes the materials for the work; it is up to the Spirit to put it to functioning. Thus advanced races have an organism or, one might say, utensils of a more refined order than the primitive races. Thus is explained the special seal which the Spirit imprints on the expression of the face and manner (Chap. VIII, n°7: The Spirit of the Earth).