The Lord of the Rings: The Two Towers2002

[Frodo attacks Sam with his sword]

Samwise Gamgee:
It's me. It's your Sam. Don't you know your Sam?

[Frodo snaps out of the spell, horrified, and drops his sword]

Frodo Baggins:
I can't do this, Sam.

Samwise Gamgee:
I know. It's all wrong. By rights we shouldn't even be here. But we are. [watching the Nazgûl flying away] It's like in the great stories, Mr. Frodo; the ones that really mattered. Full of darkness and danger, they were. And sometimes you didn't want to know the end... because how could the end be happy? How could the world go back to the way it was, when so much bad had happened? But in the end, it's only a passing thing, this shadow. Even darkness must pass. A new day will come. And when the sun shines, it will shine out the clearer. Those were the stories that stayed with you, that meant something, even if you were too small to understand why. But I think, Mr. Frodo, I do understand. I know now. 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.

Frodo Baggins:
What are we holding on to, Sam?

Samwise Gamgee:
That there's some good in this world, Mr. Frodo. And it's worth fighting for.