The mission of Joseph Smith was of a spiritual nature; and therefore, it is not to be expected that the discussion of scientific matters will be found in the Prophet's writings. The revelations given to the Prophet deal almost exclusively with the elucidation of so-called religious doctrines, and with such difficulties as arose from time to time in the organization of the Church. It is only, as it appears to us, in an incidental way that other matters, not strictly of a religious nature, are mentioned in the revelations. However, the Church teaches that all human knowledge and all the laws of nature are part of its religious system; but that some principles are of more importance than others in man's progress to eternal salvation.[A] While on the one hand, therefore, it cannot reasonably be expected that Joseph Smith should deal in his writings with any subject peculiar to natural science, yet, on the other hand, it should not surprise any student to find that the Prophet at times considered matters that do not come under the ordinary definition of religion, especially if they in any way may be connected with the laws of religion. Statements of scientific detail should not be looked for in Joseph Smith's writings, though these are not wholly wanting; but rather, we should expect to find general views of the relations of the forces of the universe. [Footnote A: "And truth is knowledge of things as they are, and as they were and as they are to come."--Doctrine and Covenants, 93:24. "Teach ye diligently and my grace shall attend you, that you may be instructed more perfectly in theory, in principle, in doctrine, in the law of the Gospel, in all things that pertain unto the Kingdom of God, that are expedient for you to understand; "Of things both in heaven and in the earth, and under the earth; things which have been, things which are, things which must shortly come to pass; things which are at home, things which are abroad; the wars and the perplexities of the nations, and the judgments which are on the land, and a knowledge also of countries and kingdoms, "That ye may be prepared in all things when I shall send you again to magnify the calling, whereunto I have called you, and the mission with which I have commissioned you."--Doctrine and Covenants, 88:78-80. "And verily, I say unto you, that it is my will that you should hasten to translate my Scriptures, and to obtain a knowledge of history, and of countries, and of kingdoms, of laws of God and man, and all this for the salvation of Zion."--Doctrine and Covenants, 93:53.