Sixth Lecture

If today we say: a function such as that of phosphorus is effective in this or that way on the human organism, then it is a matter of setting about examining the We F'ru ww. mode of action. But I have indicated how the effects of lead and phosphorus can be in the human organism. And when it is said that one cannot speak of a phosphorus function or an equisetum function, then I must point out that what a substance is is in fact only a momentarily captured state. What then is lead? One can find a name by chance because we live in a certain temperature range and in this range lead exists in a fixed state. In other world situations it is something else, it goes through metamorphoses. In fact, we are not dealing with something that is fixed at a particular level, but with processes that only show themselves to be fixed. But one can indicate how the fixation occurs.