Life Energy Fundamentals
In traditional medicine, as far back as it can be traced, the bodily fluids have been given the most attention. Of primary conceren was the blood, since the loss of much of it would lead to death. Also, its distinct color must have made an impression on Homo rudis, as well as on each generation of mankind ever since.
Traditional medicine also examined the other bodily fluids. Hippocrates (460-377 BC, see the image), the father of Western medicine, counted four of them: blood, phlegm, yellow bile, and black bile. He claimed that they had to be in balance, or the body would suffer some illness.
In other traditions, additional fluids have been given significance. For example, the tears were proof of human superiority over the beasts in the Christian tradition, since man seemed to be the only animal capable of weeping. Menstrual blood was regarded with awe, if not outright fear and condemnation, in many cultures - at least by their male population. Semen, on the other hand, has often been regarded as a substance of almost sacred might - again mostly by the males. Urine has been observed and utilized in traditional medicine and many household cures. And so on.
The importance given all those bodily fluids is probably linked to their motion. Life is movement, and Homo rudis could observe that the fluids moved constantly, so they had to be particularly enriched with life force, although not necessarily identical to it. They were carriers of it, in intricate patterns of streams inside every living body.
So, Homo rudis would easily come to the conclusion that the life force entered the body through the air, and then moved around in the body, carried by the bodily fluids. A dynamic system of movement, just as a force of life must behave.
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About meI'm a Swedish author and historian of ideas, researching the thought patterns in creation myths. I've also written books about Taoism, the Tarot, and life force concepts around the world. Click the image to get to my personal website.