“Shoot all the bluejays you want, if you can hit 'em, but remember it's a sin to kill a mockingbird.”
Explanation:
Miss Maudie explains why Atticus is correct - mockingbirds never do anyone any harm, and are not pests in any way. All they do is sing beautifully and live peacefully. Therefore, it is a sin to kill them. The mockingbird comes to represent true goodness and purity.
