Cobre, estanho e chumbo em Steiner (2010)
Since our physical body is differently constituted from that of the ancients, one point must be clearly established. It is still possible today to dispense highly potentized substances, metal potencies, for example. What is the reason for this? The explanation is that we have a deeper insight into the real being of nature. If we really understand the nature of the human body, we know that its functioning is modified by the metals I have mentioned — tin, copper, lead, and so forth. And I have shown how they modify, in the first instance, the conditions of consciousness. (Steiner 2010:28)
STEINER, Rudolf. 2010. True and false paths in spiritual investigation. (Trans.: A. H. Parker) London: Rudolf Steiner Press.