Let Me Make A Note of That

“You are protected, in short, by your ability to love!” said Dumbledore loudly. “The only protection that can possibly work against the lure of power like Voldemort’s! In spite of all the temptation you have endured, all the suffering, you remain pure of heart, just as pure as you were at the age of eleven, when you stared into a mirror that reflected your heart’s desire, and it showed you only the way to thwart Lord Voldemort, and not immortality or riches. Harry, have you any idea how few wizards could have seen what you saw in that mirror? Voldemort should have known then what he was dealing with, but he did not! . . . he was in such a hurry to mutilate his own soul, he never paused to understand the incomparable power of a soul that is untarnished and whole.”

J. K. Rowling, Dumbledore in Harry Potter and the Half-Blood Prince