1021. But there are very many other ways. Some are by castigations and repeated vexations for many years, indeed for hundreds and thousands of years. For some there are lengthy and long continued windings. It is as with [the foods] that enter the human mouth: some essences are swiftly conveyed into the brain by a very short way; some are conveyed by the veins there, and so enter into the blood; some are conveyed from the stomach, and some from the intestines. These latter come to the blood by way of the chyle, but they are continually being castigated, dissolved and again united.