“Some things must happen so that others may come to pass.”
“It must often be so, Sam, when things are in danger: some one has to give them up, lose them, so that others may keep them.”
“Some must cry so that others may be able to laugh the more heartily. Sacrifices are necessary...”
“Heroes know that things must happen when it is time for them to happen. A quest may not simply be abandoned; unicorns may go unrescued for a long time, but not forever; a happy ending cannot come in the middle of the story.”
“Some must be warriors, that others may live in peace. ”
“And so these parties divided upon that midnight plain, each passing back the way the other had come, pursuing as all travelers must inversions without end upon other men's journeys.”