Here are the contexts of the quotes tweeted from @sueannbowling between August 22 and August 28, 2013. All are from The Fellowship of the Ring, by J.R.R. Tolkien. Note that the quotes are from the book, not the movie.
“He that breaks a thing to find out what it is has left the path of wisdom.” Gandalf to Sauruman, after seeing Sauruman’s many-colored robes and hearing his explanation that white light can be broken into many colors.
“Even the most subtle spiders may leave a weak thread.” Gandalf, talking of his captivity by Sauruman.
“It is perilous to study too deeply the arts of the Enemy, for good or for ill.” Elrond, speaking of the treachery of Saruman who was corrupted by such study.
“Nothing is evil in the beginning.” Elrond, speaking of the corrupting influence of the ring.
“You may find friends along the way when you least look for it.” Elrond’s words to Frodo as the fellowship is formed.
“It would be well to trust rather to their friendship than to great wisdom.” Gandalf, arguing that the desire of Merry and Pippin to join the fellowship should be accepted.
“There must be enough water on the trail for horses.” Tourist Trap, by Sue Ann Bowling. Amber, trying to decide what to do next after she finds herself lost in the wilderness.