β
In the universe are recognized ether or spirit, force or intelligence, and matter. Matter may act upon the ether and the ether upon matter; but ether acts most effectively upon ether, and matter upon matter. The original man, in whom intelligence and other forces acted through a purely spiritual or ether body, could impress matter and be impressed by it only in part. The man was imperfect because he did not touch directly the world of matter, and could know only in part the phenomena of the material world, which forms an integral part of the universe. In the words of Joseph Smith, "Spirit and element inseparably connected, receiveth a fullness of joy, and when separated, man can not receive a fullness of joy."[A] [Footnote
β
β
John A. Widtsoe (Joseph Smith as Scientist: A Contribution to Mormon Philosophy)