Human stories are practically always about one thing, really, aren't they? Death. The inevitability of death. . . . . . (quoting an obituary) 'There is no such thing as a natural death. Nothing that ever happens to man is natural, since his presence calls the whole world into question. All men must die, but for every man his death is an accident, and even if he knows it he would sense to it an unjustifiable violation.' Well, you may agree with the words or not, but those are the key spring of The Lord Of The Rings

His grief he will not forget; but it will not darken his heart, it will teach him wisdom.

He found himself wondering at times, especially in the autumn, about the wild lands, and strange visions of mountains that he had never seen came into his dreams.

Thief, thief, thief! Baggins! We hates it, we hates it, we hates it forever!

Books ought to have good endings.How would this do: and they all settled down and lived together happily ever after?

Then Morgoth stretching out his long arm towards Dor-lomin cursed Hurin and Morwen and their offspring, saying: 'Behold! The shadow of my thought shall lie upon them wherever they go, and my hate shall pursue them to the ends of the world.

Dead men are not friends to living men, and give them no gifts. (Ghan-buri-Ghan, of allies during war)