V. Man's Communal Life Between Death and a New Birth. Birth into the Physical World.

The substances of which the physical body is composed are perpetually changing; after about seven years, every particle has been renewed. The substance is exchanged but the form endures. Between birth and death the substances of the physical body must continually be born anew; they are the ever-changing element. What we develop in such a way that death has no power over it, is preserved and builds up a new organism.