QUOTE : As a child, Harry had vehemently rejected the Sorting Hat’s assertion that he could do well in Slytherin. He was terrified to think that he had anything in common with Voldemort or that the attack might have made him more like Voldemort. If Harry can tell his child he was once considered for Slytherin, he must be healed from his old trauma. But it also means that he has accepted his true nature as genuinely Slytherin enough to be considered for that house, independent of and outlasting his trauma from Voldemort. If his child is Sorted into Slytherin, Harry will be prepared to tell him how Slytherin can help him on his way to greatness. His image of the quintessential Slytherin is no longer Voldemort but Snape. His image of bravery, that quintessential Gryffindor trait, is not any of the Gryffindor loved ones for whom he has named his children. In Harry’s story as he tells it, Severus Snape is the name he passes to his children to define bravery.