"I am the only unicorn there is." They were the first words she had spoken, even to herself, in more than a hundred years. That can't be, she though… - Peter S. Beagle

"It's a rare man who is taken for what he truly is," he said. "There is much misjudgment in the world. Now, I knew you for a unicorn when I first saw you, and I know that I am your friend. Yet you take me for a clown, or a clot, or a betrayer, and so I must be if you see me so. The magic on you is only magic and will vanish as soon as you are free, but the enchantment of error that you put on me I must wear forever in your eyes. We are not always what we seem, and hardly ever what we dream."

"He felt as if he had told a joke and they had missed the punchline and were leaning to him, wating for the kicker, the all-illuminating kicker that is found only in jokes; or as if someone had asked, "How you doing?" and the spring-and-strap arrangement in him had rusted and broken and he would never again be able to answer perfunctory questions the way other people did."

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.