[page 150, 151] Thus we see how these elemental beings are the intermediaries between the earth and the spirit-cosmos. We see the drama of the phosphorescent upsurge of the undines, which pass away in the sea of light and flame of the higher hierarchies as their sustenance; we see the upward flashing greenish-reddish lightning, which is breathed where the earth continually passes over into eternity, the eternal survival of the fire spirits, whose activity never ceases. For whereas, here on earth, birds tend to die at a particular time of year, the fire spirits make sure that what is to be seen of them pours out into the universe throughout the entire year. Thus the earth is as though cloaked in a mantle of fire. Seen from outside the earth appears fiery. But everything is brought about by beings who see the things of the earth quite differently from how man sees them. As already mentioned, man’s experience of the earth is of a hard substance on which he stands and walks about. For the gnomes it is a transparent globe, a hollow body. For the undines water is something in which they perceive the phosphorizing process, which they can take into themselves as living experience. Sylphs see in the astrality of the air, which emanates from dying birds, something that makes them into more actively flashing lightning than they would otherwise be, for in itself the lightning of these sylphs is dull and bluish. And then again the disintegration of butterfly existence is something which continually envelops the earth as though with a shell of fire. Beholding this, it seems as though the earth were surrounded by a wonderful fiery painting; and there to one side, when one looks upwards from the earth, one beholds these lightning flashes, these phosphorescent and evanescent undines. All this shows us that here on earth the elemental nature spirits move and work actively, striving upwards and passing away in the fiery mantle of the earth. In reality, however, they do not pass away, but they find their eternal existence by passing over into beings of the higher hierarchies.
Harmony of the Creative Word: The Human Being & the Elemental, Animal, Plant, and Mineral Kingdoms (CW 230) (Human Being and the Elemental, Animal, Plant and Mineral Kin)
A Beautiful Planet is a 2016 American documentary film that explores 
TimeSpace Warps 