The concept of space in Swedenborg’s philosophical works could be no other than one which recognizes a full natural world. Those concepts which deny the existence of the natural world, or demand a vacuum, are impossible. The concept of space as three dimensions leaves so many statements unexplained that it is equally impossible. The only major concept of space which acknowledges a full natural world is that of Leibnitz. This Swedenborg used as a beginning for his own concept of space.
It is generally supposed that nervous energy is some form of electricity, since a nerve can be activated by an electric charge. But there would seem to be indications that something other than electricity is here involved because, although a nerve impulse may be excited by means of an electrical stimulus, the response of the nerve is independent of the stimulus.