In saying the elementals have "no higher principles," and "When they die they perish like animals," Paracelsus does not stop to explain that the higher principles in them are absolutely latent, as in plants; and that animals in "perishing" are not destroyed, but the psychical or soul-part of the animal passes, by the processes of evolution, into higher forms. "Each species moves only in the element to which it belongs, and neither of them can go out of its appropriate element, which is to them as the air is to us, or the water to fishes; and none of them can live in the element belonging to another class. To each elemental being the element in which it lives is transparent, invisible, and respirable, as the atmosphere is to ourselves." "As far as the personalities of the elementals are concerned, it may be said that those belonging to the element of water resemble human beings of either sex; those of the air are greater and stronger; the salamanders are long, lean, and dry; the pigmies (gnomes) are the length of about two spans, but they may extend or elongate their forms until they appear like giants. "Nymphs (undines, or naiads) have their residences and palaces in the element of water; sylphs and salamanders have no fixed dwellings. Salamanders have been seen in the shape of fiery balls, or tongues of fire running over the fields or appearing in houses;" or at psychical seances as starry lights, darting and dancing about. "There are certain localities where large numbers of elementals live together, and it has occurred that a man has been admitted into their communities and lived with them for a while, and that they have become visible and tangible to him." Poets, in their moments of exaltation, have an unconscious soul-vision before which nature's invisible worlds lie like an open volume, and they translate her secrets into language of mystic meanings whose harmonies are re-interpreted by sympathetic minds. The poet Hogg, in his _Rapture of Kilmeny_, would seem to have had a vision of some such visit as that described above, into the fairyland of pure, peaceful _elementals_. "Bonny Kilmeny gaed up the glen"--and is represented as having fallen asleep. During this sleep she is transported to "a far countrye," whose gentle, lovely inhabitants receive her with delight. The following lines reveal the poet's power of inner vision, as will be seen by the words italicized. They are in wonderful accord with the descriptions given by Paracelsus from the actual observation of a _conscious seer_: "They lifted Kilmeny, they led her away, And she walk'd _in the light of a sunless day_; The sky was _a dome of crystal bright_, The _fountain of vision and fountain of light_; The emerald fields _were of dazzling glow_, And the _flowers of everlasting blow_."