Diana

“Now listen, we need to be quiet as mice. No, quieter than that. As quiet as . . . as . . .”
“Dead mice?” Reynie suggested.
“Perfect,” said Kate with an approving nod. “As quiet as dead mice.”
― Trenton Lee Stewart, The Mysterious Benedict Society and the Prisoner's Dilemma

“You know how chickens are, imagining the world coming to an end one moment, then pecking corn the next.”
― Lloyd Alexander, The Book of Three

“Vision, even for a dragon, is woefully unreliable. What you can see with great clarity may not be real; what you cannot see may be the ultimate reality.”
― T.A. Barron

“The answer to this riddle has a hole in the middle,
And some have been known to fall in it.
In tennis it's nothing, but it can be received,
And sometimes a person may win it.
Though not seen or heard it may be perceived,
Like princes or bees it's in clover.
The answer to this riddle has a hole in the middle,
And without it one cannot start over.”
― Trenton Lee Stewart, The Mysterious Benedict Society and the Prisoner's Dilemma