Lecture X

Now let us proceed to the plant-substances which man takes into himself. Man takes in plant-substances; he, too, belongs to the plant kingdom inasmuch as he develops the plant-element within himself. He contains what is of a mineral nature; this, however, continually has the tendency to become warmth-ether. The plant element continually has the tendency in man to become airy, to become gaseous. So that man has the plant element within himself in its aspect of air. Everything of a plant nature which enters man, or whatever he himself develops as inner plant organisation, must become airy, must be able to assume the form of air within him. If it does not assume the form of air, if his organization is such that it hinders him from letting what is of a plant-nature within him pass over into the form of air, he becomes ill. Everything of animal-nature which man takes in or develops within himself must—in time at least—assume the fluid, the watery form. Man may not have what is of an animal nature within him, whether inwardly produced or absorbed from outside, unless at some time it submits to the process of becoming fluid. If man is not in a position to liquidize either his own or foreign animal substance so as to transform it further into the solid, then he becomes ill. Only that in man which is indigenous to the purely human form, which arises from his nature as a being who walks upright, having within him the impulses to speak and think, only that which gives man his real humanity, which raises him above the animal—and this is at most a tenth of his whole organism—may enter into solid formation, into actual form. If anything of animal or plant nature invades the human solid form, man is ill.