To [Muzzle] a Mockingbird

"'Shoot all the blue jays you want, if you can hit 'em, but remember it's a sin to kill a mockingbird.' That was the only time I ever heard Atticus say it was a sin to do something, and I asked Miss Maudie about it. 'Your father's right,' she said. 'Mockingbirds don't do one thing except make music for us to enjoy.'"

--Harper Lee, To Kill a Mockingbird

(Sometimes you DO want to muzzle them, though, just for a little while!)