"The ‘Treasury of the Invisible’ referred to in the quotation is with reference to the “Divine Order” where the archetypes of all manifestation are to be found. It also refers to the vertical cause 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”.  Two of the most well known remedies available to treat the body on a vertical level are the Bach Flower Remedies and tissue salts – both of which have a direct correlation to the craft of astrology. The essence of true healing is not simply to remove the physical suffering; it is to assist the person to come to terms with the cause of the illness, on all levels of the vertical plane, and to understand the significance of the illness as a result. This is precisely what astrology offers – a natal chart in the hands of a qualified and skilled astrologer can yield insights relating to this vertical plane that very few other crafts are able to do."