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.

Envy nobody. It is the true secret of happiness, or at least the only one I know. (By Moonlight)

...but the enchantment of error that you put on me I must wear forever in your eyes.

My son, your ineptitude is so vast, your incompetence so profound, that I am certain you are inhabited by greater power than I have ever known.

We are not always what we seem, and hardly ever what we dream.

What use is wizardry if it cannot save a Unicorn?

...no place is more enchanted than where a unicorn has been born.