Myths and Symbols
When a scientist is examining a human body in the dissecting room or studying physiological processes from outside, he feels that the same approach can be made to every one of the organs; he uses the same instruments when dissecting the heart or the stomach; he thinks that the only matter of real importance is that of the particular chemical constituents of which these organs are composed. He has no inkling whatever that they differ fundamentally, according to the sources of their form and structure. None of these organs would exist if an astral body were not membered into man, and because the nervous system is excreted, as it were, from this inner member, the nerve-substance is, in its very essence, different from other substances. The shapers and architects of the nerve-substance have their life and being in the astral world.