The ‘Treasury of the Invisible’ in the quotation refers to the ‘Divine Order’ where the archetypes of all manifestation are to be found. It also refers to the vertical causes in contrast to the horizontal causes with which the ordinary physician is concerned. As we know, natural medicine, just like astrology, is concerned with the vertical causes – ‘the inter relation between the domains of the spirit, the soul and the body’.
Tissue salts, also known as 'cell salts' or 'biochemistry salts', are the same minerals that are found in rocks and in soil. These minerals should be present in our bodies in a perfect balance, which is the prerequisite for complete health and well-being.