69:6.2
Fire building, by a single bound, forever separated man from animal; it is the basic human invention, or discovery. Fire enabled man to stay on the ground at night as all animals are afraid of it. Fire encouraged eventide social intercourse; it not only protected against cold and wild beasts but was also employed as security against ghosts. It was at first used more for light than heat; many backward tribes refuse to sleep unless a flame burns all night.