On the basis of the fundamental laws, above defined, what does science require of its devotees? How does it affect the actions of the individual? As in theology, the scientific worker must have faith in the principles that have been discovered. It is not possible in one lifetime for a man to repeat all the work of preceding workers, to demonstrate the accuracy of their results. Much must be taken on trust; though at any time, should it be necessary, the earlier work may be repeated. Besides requiring faith in the principles discovered and enunciated by others, science demands that its every worker shall believe in things that lie far beyond the reach of man's senses. In theology, at least in the system established by Joseph Smith, a similar faith is required of the individual. God and angels have been seen by very few individuals. These realities must be accepted by faith. In the words of the Prophet Joseph, "Faith is the assurance which men have of the existence of things which they have not seen, and the principle of action in all intelligent beings." With respect to the first principle of science and theology, "Mormonism" is in entire accord with the best philosophy. The individual, whether scientist or theologian, must base his work on faith. The scientist who has acquired faith in a law of nature will no longer transgress that law. He will obey it. If he establishes the faith that a wire connected in a certain way with the electric dynamo carries a current sufficiently strong to destroy life, he will not wantonly seize that wire in his hands. Before this faith came to him, he probably came near losing his life, by the careless handling of the charged wire. To conform to the laws of nature is scientific repentance. Faith in science or religion is a high form of intelligence and is opposed to ignorance. Repentance is the use of this intelligence for the benefit of man. In "Mormonism" the second principle of action for the individual is repentance. If faith in God has been attained and his laws have been made clear, the believer will no longer violate those laws; he will obey them. That is repentance. Not by a jot or tittle does this kind of repentance differ from the repentance taught by science. True, science does not _speak_ of repentance, but it _thinks_ it. In the matter of the great principle of repentance, governing the action of workers in science or theology, "Mormonism" is eminently sane and philosophical. Faith does not compel men to repent; but it is a necessary precedent. The man who does not repent in science or theology, after he has acquired faith, renders himself liable to injury and retards his own progress. In the system of theology taught by Joseph Smith, baptism is the third great principle to be obeyed by the individual; that is, unless baptism follows faith and repentance it is impossible to enter the kingdom of God. In science there is a counterpart of baptism which is the third principle of scientific progress.