Furthermore, many organs — I have already spoken of the sense organs — have been built up out of the world which I described as the world of the second level of consciousness. Copper and iron raise man to this second level of consciousness. Mercury has a different effect. It must of necessity be present in the universe; and, in effect, it exists universally in a subtle state of diffusion. We are surrounded, if I may so express it, by an atmosphere of mercury. The moment man absorbs more than the normal quantity of mercury, his organism endeavours to neutralize all those organs which have been built up from the physical and elemental worlds. The astral body of man is stimulated, as it were, to call upon only those organs that have been built up out of the world of stars. (Steiner 2010:34)
STEINER, Rudolf. 2010. True and false paths in spiritual investigation. (Trans.: A. H. Parker) London: Rudolf Steiner Press.