51:1.8

On Jerusem the loyal children of any Adam and Eve are immortal, but the offspring of a Material Son and Daughter procreated subsequent to their arrival on an evolutionary planet are not thus immune to natural death. There occurs a change in the life-transmitting mechanism when these Sons are rematerialized for reproductive function on an evolutionary world. The Life Carriers designedly deprive the Planetary Adams and Eves of the power of begetting undying sons and daughters. If they do not default, an Adam and Eve on a planetary mission can live on indefinitely, but within certain limits their children experience decreasing longevity with each succeeding generation.