[Sidenote: Why am I on earth?]
In the preceding chapter the law of evolution was shown to be the cementing law of nature, which explains the destiny of man. To live is to change, and (if the change is right) to grow. Through all the ages to come righteous man will increase in complexity and will grow towards a condition of greater knowledge, greater power and greater opportunity.
While the great law of evolution may be quite sufficient for the general survey, it does not explain the special conditions amidst which organized intelligences find themselves. Man asks, Why am I on earth? Science is silent. Up to the present time, many scientific men have not found it necessary to postulate an intelligent force behind the phenomena of nature, which would explain our earthly existence.
The Mormon answer to this question lies in the Mormon doctrine of the plan of salvation. There can be no attempt to harmonize the Mormon plan with that of science, for science has none; but, that the Mormon plan of salvation is strictly scientific, and rests upon the irrevocable laws of the universe can certainly be demonstrated.
[Sidenote: Perfection comes only when matter, spirit and intelligence are associated.]
Fundamental, in the doctrines of Joseph, is the statement that all intelligence is eternal; and that God at the best is the organizer of the spirits of men. The ether of science has been compared with the Holy Spirit of Mormonism. The spirit body may be likened to an ether body of man, and is the condition of his original existence. From the original condition, at man's spiritual birth, under the law of evolution he has steadily grown in complexity, which means in power.
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 A: Doctrine and Covenants, 93:33, 34.]
For man's perfection, it then became necessary that his spiritual body should be clothed with a material one, and that he should become as familiar with the world of matter, as he had become with the world of spirit. God, as the supreme intelligence, who desired all other spirits to know and become mighty, led in the formulation of the plan, whereby they should obtain knowledge of all the contents of the universe.
[Sidenote: The fall of Adam necessary to perfect intelligence.]