What's your fav. line in the movies or the books?

One from the movie:

Bilbo Baggins! Do not take me for some conjurer of cheap tricks!!
- Gandalf

I love the anger in that and the way Gandalf grows bigger as the room gets darker. Not to mention the great look on Bilbo's face and the way he backs off.

Three from the books that come to mind, strangely enough all said in Rivendell:

Ash nazg durbatuluk, ash nazg gimbatul, ash nazg thrakatuluk agh burzum-ishi krimpatul.
- Gandalf

When winter first begins to bite,
And stones crack in the frosty night,
when pools are black and trees are bare,
'tis evil in the wild to fare.
- Bilbo

Faithless is he that says farewell when the road darkens.
- Gimli

I could probably find more if I put my mind to it, those are ones that stood out for me.