In a tangent from a somewhat unrelated Pit thread, Polycarp posted the following:
I’m going to move this excellent question into GD, in order to keep in separate. This is going to get into some of the more non-traditional beliefs of the Mormons; some of these beliefs drive others absolutely crazy. So I’m going to request that we keep this civil and above-board.
We consider there to be only one sapient species, one family. This species goes through a long period of growth and learning. Angels are either people who have already died, or people who have not yet been born. They may be spirit beings, or have bodies. (See the Bible Dictionary for a detailed explanation, with references.) People living on the earth now are a composite of spirit and body, the whole of which is a soul. A body is necessary to us; we are incomplete without one, though right now our bodies are imperfect and fallen.
Assigned reading: Abraham 3, especially 22-28. Once upon a time, all of us lived together with our Heavenly Father. We were spirits, and needed a place to go where we could obtain bodies and learn good and evil for ourselves. God proposed a plan for us, which entailed a necessary sacrifice for sin. Lucifer came up with another one, which involved all people being forced never to sin and thus all coming back to heaven. He wanted all the glory for this (IOW, he wanted to take the Father’s place). Jesus supported the Father’s plan and volunteered for the job. A war ensued between the adherents to each side (what that ‘war’ entailed and what was done, we don’t know). Those who chose Lucifer’s plan went with him, and became fallen angels. They will never receive a body or be able to progress, having rejected the Father’s creation. The rest of us get born on earth, to gain experience and learn things for ourselves. (Thus, according to us, you did in fact ask to be born.)
We agree there (except that of course, since we aren’t Catholic, we don’t believe Mary to have been sinless). Our view of the Godhead is of course a bit different than the traditional one, but that doesn’t really come in here, since we do believe Christ to be part of the Godhead.
As above, we do not have that distinction. Moroni is a resurrected person. He is also an angel. (But we only use the term ‘archangel’ to refer to Michael.) Since Moroni was a prophet while on earth, and is one of the “noble and great ones” (see Doctrine and Covenants 138:55), he, along with others, is a heavenly messenger. Since he originally put the Golden Plates away, he was the one to show them to Joseph Smith; he has a kind of stewardship over them.
Well, the first part is correct. Lucifer is not, however, ‘altogether distinct’ in the way you mean. He is a member of the same species as we are, but he is fallen and in rebellion, and will never gain the kingdon of Heaven, because he doesn’t want it. He has rejected the entire plan and has rejected God completely.
And now we come to the necessary Big Picture. As you can see, our beliefs diverge in many respects from traditional ones, most obviously that we believe that we existed before we were born. (The assigned reading here is Doctrine & Covenants 93:29-36, and Abraham 3 again, 19-22.) Not only that, but we believe that some part of us is eternal and uncreated. That part, which we call intelligence, is the very core of our being and is where our free will comes from. Heavenly Father took the intelligences and organized spirit bodies for them. (I always imagine little glowing balls of light floating around, but there’s no actual information on what intelligences look like or where they come from.) Thus we began our journey to become as much like Him as we can, for Heavenly Father is intelligent too–but of course infinitely more so than we are. So, once we became spirits, we found that we needed bodies to continue to learn and grow and become like our Father (who has a glorified and perfected body). We get born on earth to gain physical bodies. Once we die, we lose them again, but only for a time. Someday we will all be resurrected and have our bodies again, only perfected and undying this time. How far we go towards perfection, however, is entirely up to each person. Heavenly Father’s goal is to help us get as far as we want to–hopefully to grow up completely and become like Him.