J.R.R Tolkien was a Christian, and that influenced his books. He did not set out to make any intentional comparisons on the Bible.
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The Ring means sin. And when Frodo destroyed the ring in Mt. Doom, he was casting away his sins. Like we do when we ask Jesus in our lives, He takes away our sins. Sorry, Christianity cannot steal this one. The ring was power and domination. Frodo did not cast it away, it had him in the end. Just as Gandalf said, Smeagol had a part to play yet. If it was not for him, Frodo would have kept it.
The main conflict can be seen as the struggle to get the Ring destroyed and to keep Sauron from getting it. The first volume, Fellowship of the Ring, is mostly an account of a journey, and the conflict is with obstacles between the protagonists and the destination. These obstacles include, but are not limited to: -Black Riders -An evil forest -Evil tomb spirits -More Black Riders -Bitterly cold and snowy weather -Wolves -A monster in a lake -Lots of orcs -A Balrog, a being of fire and shadow -Lots more orcs It should also be noted that there is also a less physical and more internal conflict: the struggle to resist the power of the Ring. The ring wants to get back to Sauron, and tries to poison the minds of those near it, so the protagonists must be constantly resisting its lure.
Gimli son of Glóin is a character in Tolkien's LotR. He is a Dwarf fom the Lonely Mountain, the son of Glóin who also appeared in The Hobbit. Gimli is a member of the Fellowship of the Ring.
Gospel
Kimimaro's curse mark is the seal of heaven, just like Sasuke's