The first is very famous, the second very true:
“I am old, Gandalf. I don’t look it, but I am beginning to feel it in my heart of hearts. Well-preserved indeed!” he snorted. “Why, I feel all thin, sort of stretched, if you know what I mean: like butter that has been scraped over too much bread. That can’t be right. I need a change, or something."
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“I tried to save the Shire, and it has been saved, but not for me. 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.”