Volcanic cataclysms destroyed the greater part of the Lemurian continent and in its stead rose the Atlantean continent, where the Atlantic Ocean now is.
Material scientists, impelled by the story of Plato to undertake researched regarding Atlantis, have demonstrated that there is ample foundation for the story that such a continent did exist. Occult scientists know that it existed and they also know that the conditions there were such as shall now be described.
Ancient Atlantis differed from our present world in many ways, but the greatest difference was in the constitution of the atmosphere and the water of that Epoch.
From the southern part of the planet came the hot, fiery breath of the volcanoes which were still abundantly active. From the north swept down the icy blasts of the Polar region. The continent of Atlantis was the meeting place of those two currents, consequently its atmosphere was always filled with a thick and murky fog. The water was not so dense as now, but contained a greater proportion of air. Much water was also held in suspension in the heavy, foggy Atlantean atmosphere.
Through this atmosphere the Sun never clearly shone. It appeared to be surrounded by an aura of light-mist, as do street-lamps when seen through a dense fog. It was then possible to see only a few feet in any direction and the outlines of all objects not close at hand appeared dim, hazy and uncertain. Man was guided more by internal perception than by external vision.
Not only the country, but also the man of that time was very different from anything existent on earth at the present time. He had a head, but scarcely any forehead; his brain had no frontal development; the head sloped almost abruptly back from a point just above the eyes. As compared with our present humanity; he was a giant; his arms and legs were much longer, in proportion to this body, than ours. Instead of walking, he progressed by a series of flying leaps, not unlike those of the kangaroo. He had small blinking eyes and his hair was round in section. The latter peculiarity, if no other, distinguishes the descendants of the Atlantean races who remain with us at the present day. Their hair was straight, glossy, black and round in section. That of the Aryan, thought it may differ in color, is always oval in section. The ears of the Atlantean sat much further back upon the head than do those of the Aryan.
The higher vehicles of the early Atlanteans were not drawn into a concentric position in relation to the dense body, as are ours. The spirit was not quite an indwelling spirit; it was partially outside, therefore could not control its vehicles with as great facility as though it dwelt entirely inside. The head of the vital body was outside of and held a position far above the physical head. There is a point between the eyebrows and about half an inch below the surface of the skin, which has a corresponding point in the vital body. This point is not the pituitary body, which lies much deeper in the head of the dense body. It might be called "the root of the nose." When these two points in the dense and the vital bodies come into correspondence, as they do in man today, the trained clairvoyant sees then as a black spot, or rather as a vacant space, like the invisible core of a gas flame. This is the seat of the indwelling spirit in the man--the Holy of Holies in the temple of the human body, barred to all but that indwelling human Ego whose home it is. The trained clairvoyant can see with more or less distinctness, according to his capacity and training, all the different bodies which form the aura of man. This spot alone is hidden from him. This is the "Isis" whose veil none may lift. Not even the highest evolved being on earth is capable of unveiling the Ego of the humblest and least developed creature. That, and that alone upon earth, is so sacred that it is absolutely safe from intrusion.
These two points just spoken of--the one in the dense body and its counterpart in the vital body--were far apart in the men of the early Atlanteans days, as they are in the animals of our day. The head of the horse's vital body is far outside the head of its dense body. The two points are closer together in the dog than in any other animal except, perhaps, the elephant. When they come into correspondence we have an animal prodigy, able to count, spell, etc.
On account of the distance between these two points, the Atlantean's power of perception or vision was much keener in the inner Worlds than in the dense Physical World, obscured by its atmosphere of thick, heavy fog. In the fullness of time, however, the atmosphere slowly became clearer; at the same time, the point spoken of in the vital body came closer and closer to the corresponding point in the dense body. As the two approached each other, man gradually lost touch with the inner Worlds. They became dimmer as the dense Physical World became clearer in outline. Finally, in the last third of the Atlantean Epoch, the point in the vital body was united to the corresponding point in the dense body. Not until then did man become fully awake in the dense Physical World; but at the same time that full sight and perception in the Physical World were gained, the capability of perceiving the inner Worlds were gradually lost to most of the people.
Source: HEINDEL, Max, The Rosicrucian Cosmo-Conception