No one is so suspicious and so sensitive as those whose conscience is not sensitive enough. Such people who wander in error themselves, are like porcupines: it is very difficult to approach them. The alchemists have suitable names for them as arsenic, vipers, etc., and yet they seek in all these substances, and in antimony, lead, and many other materials, for a true mercury that has just as many names as there are substances in which it is found; oil, vinegar, honey, wormwood, etc. Under all its names mercury is still, however, a single immutable thing. It was also called an incombustible sulphur for whoever has his conscience once rightly awakened, has in his heart an endlessly burning flame that eats up everything that is contrary to his nature. This fire that can burn like “poison” is a powerful medicine, the only right one for a (morally) sick soul. Conscience in the crude state is generally called by the alchemists “common quicksilver” in contrast to “our quicksilver.” To replace the first by the second and, according to the demands of nature, not forcibly, is the one great aim that the hermetics follow. This first goal is a preparation for a further work. Whither this leads we can represent in one word—“God”—and even here we may be struck with the “circular” character of the whole hermetic work, since the heavenly mercury that is necessary to the preliminary work, to the purification, is yet itself a gift of God; the beginning depends on the end and presupposes it. The symbol of the prima materia is not without purpose a snake that has its tail in its mouth. I cannot, in anticipation, enter into the problem that arises in this connection; only let it be understood in a word that the end can soar beyond the beginning as an ideal.