Harry Potter and The Order of the Phoenix

Fools who wear their hearts proudly on their sleeves, who cannot control their emotions, who wallow in sad memories and allow themselves to be provoked so easily — weak people, in other words

“They can’t have done,” said Hermione in a low voice.
“You’re so naive,” said Ron, “you think just because you’re all honorable and trustworthy —”
“No, they can’t have done because I put a jinx on that piece of parchment we all signed,” said Hermione grimly. “Believe me, if anyone’s run off and told Umbridge, we’ll know exactly who they are and they will really regret it.”

sister’s going — what d’you mean, Michael Corner?”