Quote from : The Lord of the Rings: The Two Towers Movie

Sam: Hey, Stinker! Don't go getting too far ahead.
Frodo: Why do you do that?
Sam: What?
Frodo: Call him names, run him down all the time.
Sam: Because... because that's what he is, Mr. Frodo. There's naught left in him but lies and deceit. It's the ring he wants; it's all he cares about.
Frodo: You have no idea what it did to him... what it's still doing to him. I want to help him, Sam.
Sam: Why?
Frodo: Because I have to believe he can come back.
Sam: You can't save him, Mr. Frodo.
Frodo: [snaps] What do you know about it? Nothing!... I'm sorry, Sam. I don't know why I said that.
Sam: I do. It's the ring. You can't take your eyes off it; I've seen you. You're not eating. You barely sleep. It's taken ahold of you, Mr. Frodo. You have to fight it.
Frodo: I know what I have to do, Sam. The ring was entrusted to *me*. It's my task, mine, my own!
[storms off]
Sam: Can't you hear yourself? Don't you know who you sound like?