Albus Severus Potter (19 Years Later): Dad, what if I am put in Slytherin?
Harry Potter: Albus Severus Potter, you were named after two headmasters of Hogwarts. One of them was a Slytherin, and he was the bravest man I've ever known.
Albus Severus Potter (19 Years Later): But just say that I am...
Harry Potter: Then Slytherin house will have gained a wonderful, young wizard. But listen, if it really means that much to you, you can choose Gryfindor. The Sorting Hat takes your choice into account.