Obviously, not from the Christian God, but then it really wouldn't be as much a fanstasy if it used a real world God.
In some ways, Tolkien's mythology parallels the Old Testament. The "genesis" of his mythology involves the rebellion of an archangel (for want of a better term) who believes that he should have the power to create life and be equal to the one God. The Silmarillion, chronologically the first book, is about a war waged by this fallen archangel against the rest of the world. The parallel to the fall of Lucifer is obvious. And as with Satan, the fatal flaw of this archangel is hubris
The Lord of the Rings tells the story of a later time, where a fallen angel who served the archangel tries to dominate the world as well. The wizards are not human at all, but rather good angels who were sent to help the rest of the world against this fallen angel. Though Tolkien doesn't use the terms angel and archangel, the connection between those concepts and the way he describes his beings are clear.
The tone of the LOTR, as others have pointed out, is very Christian. The hero hobbit Frodo basically sacrifices himself to protect the world from a greater evil, and his greatest strength is his moral courage and humility. It is a profoundly moral story, and the morality it teaches is a good one. In fact, many people who don't like LOTR blast it for its obvious Christian overtones, and view it as propaganda for Christianity.
The Iluvatar spoke, and he said: `Mighty are the Ainur, and mightiest among them is Melkor; but that he may know, and all the Ainur, that I am Iluvatar, those things that ye have sung, I will show them forth, that ye may see what ye have done. And thou, Melkor, shalt see that no theme may be played that hath not its uttermost source in me, nor can any alter the music in my despite. For he that attempteth this shall prove but mine instrument in the devising of things more wonderful, which he himself hath not imagined.'- J.R.R. Tolkien, "Ainulindale, The Music of the Ainur"
Thanks X, for answering the questions about the 'angelic' nature of the Istari, while I was out provisioning my larder. I think that there are many who see this prototypical novel as being bound by its genre imitators. They say, 'wizards, dwarves, elves, it must be a child's fantasy'.
This is roughly the equivalent of saying that since a sword and sorcery novel like Conan the Barbarian is light entertainment, that the original story of this type, The Odyssey, is light entertainment also. Having closed their eyes to the possibility that LOTR is great literature, they are not able to see what is there.
Wizards were angelic beings sent from God in LOTR?Obviously, not from the Christian God, but then it really wouldn't be as much a fanstasy if it used a real world God.
Well, actually, Tolkien was at pains to write his stories in such a way that, if they were true, they would be perfectly consistent with Christianity. That is, Tolkien's fictional God is the same God as that of Christianity, only the events are taking place at a mythical time, many thousands of years before recorded history. Hence, the God in his stories is the Christian God; but this is not explicitly stated, because the stories are supposed to be a self-contained myth, not an allegory (Tolkien hated allegories, and for good reason, IMO).