Doctrine on the mind of man

Great Joseph Smith quotes on the core LDS doctrine on immortality & matter from http://en.wikiquote.org/wiki/Joseph_Smith,_Jr. ---

There is no such thing as immaterial matter. All spirit is matter, but is more fine or pure, and can only be discerned by purer eyes. We cannot see it, but when our bodies are purified, we shall see that it is all matter. --Doctrine and Covenants 131:7-8 (May 17, 1843)

[W]e shall find a very material difference between the body and the spirit; the body is supposed to be organized matter, and the spirit, by many, is thought to be immaterial, without substance. With this latter statement we should beg leave to differ, and state the spirit is a substance; that it is material, but that it is more pure, elastic and refined matter than the body; that it existed before the body, can exist in the body; and will exist separate from the body, when the body will be mouldering in the dust; and will in the resurrection, be again united with it. --Joseph Fielding Smith (editor), Teachings of the Prophet Joseph Smith, p. 207 (April 1, 1842)

You ask the learned doctors why they say the world was made out of nothing; and they will answer, 'Doesn't the Bible say He created the world?' And they infer, from the word create, that it must have been made out of nothing. Now, the word create came from the word baurau which does not mean to create out of nothing; it means to organize; the same as a man would organize materials and build a ship. Hence, we infer that God had materials to organize the world out of chaos—chaotic matter, which is element, and in which dwells all the glory. Element had an existence from the time he had. The pure principles of element are principles which can never be destroyed; they may be organized and re-organized, but not destroyed. They had no beginning, and can have no end. . . . [T]he mind of man—the immortal spirit. Where did it come from? All learned men and doctors of divinity say that God created it in the beginning; but it is not so: the very idea lessens man in my estimation. I do not believe the doctrine; I know better. Hear it, all ye ends of the world; for God has told me so . . . We say that God himself is a self-existent being. Who told you so? It is correct enough; but how did it get into your heads? Who told you that man did not exist in like manner upon the same principles? Man does exist upon the same principles. God made a tabernacle and put a spirit into it, and it became a living soul. . . . How does it read in the Hebrew? It does not say in the Hebrew that God created the spirit of man. It says 'God made man out of the earth and put into him Adam's spirit, and so became a living body.' The mind or the intelligence which man possesses is [co-eternal] with God himself. I know that my testimony is true . . . Is it logical to say that the intelligence of spirits is immortal, and yet that it had a beginning? The intelligence of spirits had no beginning, neither will it have an end. That is good logic. That which has a beginning may have an end. There never was a time when there were not spirits; for they are [co-eternal] with our Father in heaven. . . . I take my ring from my finger and liken it unto the mind of man—the immortal part, because it has no beginning. Suppose you cut it in two; then it has a beginning and an end; but join it again, and it continues one eternal round. So with the spirit of man. As the Lord liveth, if it had a beginning, it will have an end. All the fools and learned and wise men from the beginning of creation, who say that the spirit of man had a beginning, prove that it must have an end; and if that doctrine is true, then the doctrine of annihilation would be true. But if I am right, I might with boldness proclaim from the house-tops that God never had the power to create the spirit of man at all. God himself could not create himself. --History of the Church 6:308-309