"When Sauron learned of the repentance and revolt of Celebrimbor his disguise fell and his wrath was revealed," "demanding that all the rings should be delivered to him, since the Elven-smiths could not have attained to their making without his lore and counsel."
-UT/Silmarillion

"Warm and eager was [Gandalf's] spirit, for he was the enemy of Sauron, opposing the fire that devours and wastes with the fire that kindles."
-Unfinished Tales

"Only the victory of the West will allow Bombadil to continue, or even to survive. Nothing would be left for him in the world of Sauron."
-Tolkien Letter 144
"I think that in the end, if all else is conquered, Bombadil will fall, Last as he was First; and then Night will come."
-Glorfindel in FOTR

"Narya, Nenya, and Vilya, they were named...and of all the Elven-rings Sauron most desired to possess them, for those who had them in their keeping could ward off the decays of time and postpone the weariness of the world."
-The Silmarillion

"About their origins, at any rate, I know more than hobbits do themselves."
-Gandalf in The Fellowship of the Ring

"A great force [was] moved over Calenardhon to the invasion of Eriador. When news of this reached Gil-galad he sent out a force under Elrond Half-elven; but Elrond had far to go."
-Unfinished Tales

"I am afraid that was the last they ever saw of those excellent little ponies...for goblins eat horses and ponies."
-The Hobbit