Dumbledore will only leave from Hogwarts when there are none... - J.K. Rowling, Harry Potter and the Half-Blood Prince

"Dumbledore says people find it far easier to forgive others for being wrong than being right."

"The thing about growing up with Fred and George,"said Ginny thoughtfully, "is that you sort of start thinking anything's possible if you've got enough nerve."

"It is the unknown we fear when we look upon death and darkness, nothing more."

"I don't mean to be rude—"he began, in a tone that threatened rudeness in every syllable."Yet, sadly, accidental rudeness occurs alarmingly often,"Dumbledore finished the sentence gravely."

"I was supposed to be waiting up here when you got back, only your Phoenix lot got in the way...”“Yes, they do that,” said Dumbledore."