How we cite our quotes: All quotations are from The Two Towers.
Quote #1
SARUMAN: The old world will burn in the fires of industry; the forests will fall; a new order will rise. We will drive the machine of war with the sword and the spear and the iron fists of the orc. We have only to remove those who oppose us.
The old world burning may be a metaphor for change, but it's also totally literal. Saruman is using the trees of Fangorn to fuel his industry of war. "Industry," and "war": two words that we'll need to watch out for as the movie progresses.
Quote #2
PIPPIN: And whose side are you on?
TREEBEARD: Side? I am on nobody's side because nobody's on my side, little orc. Nobody cares for the woods anymore.
Elves and wizards used to walk through Fangorn and speak with the ents, but in the third age they are forgotten, or worse, people are frightened of them. When Aragorn finds that Merry and Pippin have fled into the forest, Gimli asks what madness could have driven them in there. To be fair, these giant talking tree people can be a bit scary.
Quote #3
TREEBEARD: Sounds like orc mischief to me. They come with fire; they come with axes: gnawing, biting, breaking, hacking, burning! Destroyers and usurpers, curse them!
Mischief sounds like an understatement. The orcs are completely destroying the forest and its inhabitants. Saruman keeps talking about the dawn of a new era as his orcs begin to usurp the rightful place of other species that once inhabited Middle-earth.