Lecture III
In fact, when a mineral is examined clairvoyantly something like the following is presented to view: the physical part is seen rayed round by the light-forms of the etheric body, these rays of light appear to broaden and radiate continually into space till they ultimately disappear as if into a hollow globe. You can think of every mineral as being the centre of such a hollow globe, and that these are present everywhere in the world. These hollow globes interpenetrate each other, and if we can picture clairvoyant power enhanced more and more to where these rays unite we arrive at where the egos of the minerals stream towards us from every direction of space. These egos reveal themselves to clairvoyant capacity when it enters the higher regions of the devachanic plane. Whereas the rays which compose the astral body are in the lower regions, the ego is in the higher devachanic world.