And now the kingdoms appear, and invisible germs, floating in the ethereal _aura_ of the earth, whirl about in its gaseous robe and are then attracted to the deep bosom of the ocean and over the first continents that pierce their way to the surface. The vegetable and animal worlds, still in confusion, appear almost at the same time. Esoteric teachings admit of the transformation of animal species, not only in accordance with the secondary law of selection, but also by the primary law of the percussion of the earth by celestial powers, and of all living beings by intelligible principles and invisible forces. When a new species appears on the globe, the reason is that a race of souls of a superior type is being incarnated at a given epoch in the descendants of the former species, to cause it to mount a step in the ladder of evolution by moulding it afresh and transforming it into its image. Thus the esoteric doctrine explains the appearance of man on earth. From the point of view of terrestrial evolution, man is the latest branch, the crown of all the former species. But this point of view is no more sufficient to explain his entrance on to the stage of life, than it would be to explain the appearance of the first sea-weed or the first crustacean in the depths of the sea. All these successive creations infer, as does each birth, the percussion of the earth by the invisible powers which create life. That of man infers the previous reign of a celestial humanity presiding over the unfolding of terrestrial humanity, and sends it, like the waves of a formidable tide, fresh torrents of souls which become incarnate in its womb and cause to shine forth the first beams of a divine light in that bold, impulsive, terrified being who, though only just freed from the darkness of animality, is forced, in order to live, to struggle with all the powers of nature. Pythagoras had obtained in Egyptian temples clear notions as to the mighty revolutions of the globe. The Indian and Egyptian teachings spoke of the existence of the ancient austral continent which had produced the red race and a powerful civilization, called by the Greeks, the Atlantides. They attributed the alternate emergence and immersion of continents to the oscillation of the poles and acknowledged that humanity had thus passed through six deluges. Each interdiluvian cycle brings about the predominance of a great human race. In the midst of the partial eclipses of civilization and human faculties, there is a general ascending movement.