“But I haven’t got uncommon skill and power,” said Harry, before he could stop himself.
“Yes, you have,” said Dumbledore firmly. “You have a power that Voldemort has never had. “You can —”
“I know!” said Harry impatiently. “I can love!” It was only with difficulty that he stopped himself adding, “Big deal!”
“Yes, Harry, you can love,” said Dumbledore, who looked as though he knew perfectly well what Harry had just refrained from saying. “Which, given everything that has happened to you, is a great and remarkable thing. You are still too young to understand how unusual you are, Harry.”
“So, when the prophecy says that I’ll have ‘power the Dark Lord knows not,’ it just means — love?” asked harry, feeling a little let down.
“Yes — just love,” said Dumbledore.
Harry Potter and the Half-Blood Prince – J.K. Rowling