There is no good and evil, there is only power and those too... - J.K. Rowling, Harry Potter and the Sorcerer's Stone

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

"They heard the click of the mail slot and flop of letters on the doormat. "Get the mail, Dudley,"said Uncle Vernon from behind his paper. "Make Harry get it.""Get the mail, Harry.""Make Dudley get it.""Poke him with your Smelting stick, Dudley."

"What happened down in the dungeons between you and Professor Quirrell is a complete secret, so, naturally the whole school knows."

"Do you mean ter tell me,"he growled at the Dursleys, "that this boy—this boy!—knows nothin' abou'—about ANYTHING?"Harry thought this was going a bit far. He had been to school, after all, and his marks weren't bad."I know some things,"he said. "I can, you know, do math and stuff."

"He didn't realize that love as powerful as your mother's for you leaves its own mark."