"...like a grain of sand that gets into an oyster's shell. What if the grain doesn't want to become a pearl? Is it ever asked to climb out quietly and take up its old position as a bit of ocean floor?"

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Easy climb, Kurokuma. You do it easily.' 'Not on your life,' Horace said... 'That's what we have Rangers for. They climb up sheer rock walls and crawl along narrow, slippery ledges. I'm a trained warrior, and I'm far to valuable to risk such shenanigans.' 'We're not valuable?' Will said, feigning insult. Horace looked at him. 'We've got two of you. We can always afford to lose one,' he said firmly.

— John Flanagan