Folk in those stories had lots of chances of turning back, only they didn't. They kept going because they were holding on to something.... That there's some good in the world, Mr. Frodo, and it's worth fighting for.

But fear no more! I would not take this thing, if it lay by the highway. Not were Minas Tirith falling in ruin and I alone could save her, so, using the weapon of the Dark Lord for her good and my glory. No, I do not wish for such triumphs, Frodo son of Drogo.

There cannot be any 'story' without a fall - all stories are ultimately about the fall - at least not for human minds as we know them and have them.

These folk are hewers of trees and hunters of beasts; therefore we are their unfriends, and if they will not depart we shall afflict them in all ways that we can." -- The Silmarllion, JRR Tolkien

I invented that little rhyme about 'One Ring to rule them all', I remember, in the bath one day.

Out of doubt, out of dark to the day's rising I came singing into the sun, sword unsheathing. To hope's end I rode and to heart's breaking: Now for wrath, now for ruin and a red nightfall!

Indeed in nothing is the power of the Dark Lord more clearly shown than in the estrangement that divides all those who still oppose him.