“Where military service begins, logic ends.”

“One arrow does not bring down two birds.”

“No matter how far you have gone on a wrong road turn back.”

“Who seeks a faultless friend remains friendless.”

“None is so rich as to throw away a friend.”

“Satan's friendship reaches to the prison door.”

“The truth." Dumbledore sighed. "It is a beautiful and terrible thing, and should therefore be treated with great caution.”

“The truth is rarely pure and never simple.”

“Never tell the truth to people who are not worthy of it.”