The grain of mustard seed, or the seed of the tree, is according to us, the plant or inferior animal into which the sun has thrown the animated germ. The subterranean plantlet corresponds to the animal whose mission it is to perfect the germ transmitted by the plant, and which develops and amplifies this germ; for example, to the fish or the reptile, perfecting the spiritual principle which they have received from the zoophyte or the mollusc. The shoot which, having burst out of the earth, grows in the shade of the grass, and tries its air organs, corresponds to the animal somewhat more elevated in the organic scale, such as the bird, in which the animating principle--derived from the reptile or the fish--increases in intellectual power. The young vegetable, arrived at the condition of the twig, which lives a completely aërial life, corresponds to the mammifer. The tree, grown tall, and pushing out its young boughs, corresponds to man, perfecting the soul which he has received from a mammifer. Finally, the powerful and vigorous forest lord, over-topping all the neighbouring trees in size and majesty, with mighty girth of stem, and noble crest, with wide-spreading branches and splendid flowers, this grand creature corresponds to the superhuman being who lives in the bosom of the ethereal fluid, and who is himself destined to be replaced by a series of superior creatures, who shall climb from stage to stage, from height to height, even to the radiant kingdom of the sun, where those absolutely spiritual beings, whose essence is entire and perfect immateriality are enthroned. Thus, the animating principle remains immutable and identical with itself, during all the transformations undergone by the beings who are successively charged to receive this precious deposit. From the vegetable, in which it had its first domicile as a germ, and through the whole series of living creatures, from the plant and the zoophyte to the man and the superhuman being, the same spiritual principle is preserved in its identity, perfecting and amplifying itself without cessation.