All our sensory organs contain a large amount of etheric matter of various densities & the properties of this matter are still in a hidden state for most of us. We all have an astral & mental body & each of these bodies can be awakened & begin to respond accordingly, opening completely new & vast worlds of knowledge & power. These new worlds, which are all around us, freely penetrate into each other, with the lower astral forming a direct continuation of the higher physical, just as the lower mental in turn forms a direct continuation of the higher astral. It is possible to persistently & gradually expand our feelings so that with our eyes & ears, we would be able to perceive much higher & much lower vibrations. A large group of these additional vibrations will still belong to the physical plane & will simply give us the opportunity to receive impressions from the etheric part of this plane. Such impressions will be received through the retina of...