VI. Diphtheria and Influenza—Crossed Eyes

Here is the skin; I have already talked about it. The skin is constantly in contact with the outer air, with the external world, which causes it to become calloused. In humans it only becomes a little calloused and then sloughs off. The skin all over man's body constantly sloughs off. Man is continuously sloughing off his entire body. He is continuously exchanging his physical body because of outside influences. You can imagine what a tremendous influence the air has on the living body when you consider the following. Think of a being that lives entirely in water. The skin it forms will be quite soft. The water itself causes it to form skin that is quite soft. Particularly through the influence of sunlight, the soft skin is pulled forward, and the being in the water becomes a fish. You can hardly see the jaw of a fish, because it is entirely covered with skin. Now imagine that this creature does not live in water but in the air. If this being lives in the air, it cannot form the soft skin. If this being who has lived in the water could not form the soft skin, his jaw would no longer be inside; the whole inner jaw would lie outside, and he would be a bird. The jaw of the fish in the water is simply covered with soft skin. By virtue of living in the air, the bird is equipped with an exposed jaw, a jaw lying completely outside. Thus you see the influence exerted on a creature from outside. Man, however, can form soft skin with other organs, but this soft skin is always being sloughed off, worked off.