Why is Harry's insistence on being placed in Gryffindor House instead of Slytherin House so significant in terms of his development as a character?

Throughout the novel, Rowling emphasizes the importance of choice in determining an individual's character and direction in life. It is the choices that we make that establish what kind of person we will become. With that in mind, Harry's refusal to be placed in Slytherin House, despite his many similarities with Voldemort, is crucial in terms of his characterization. Harry could have remained passive during the Sorting and would have ultimately been sorted into Slytherin. Yet, by taking an active role in his Sorting and choosing to be placed in Gryffindor, Harry demonstrates his determination to choose his own direction in life and not adhere to anyone else's perception of his nature.At the beginning of the book, it seems as if there are clear distinctions between good and evil: Professor Dumbledore and Harry are wholly good, while Voldemort and his Death Eaters are wholly evil. Yet, over the course of the narrative, Rowling complicates the issue and creates a sort of moral ambiguity, particularly in the character of Professor Snape. From the start, Professor Snape is presented to be a malignant follower of Lord Voldemort, and Harry is only too ready to believe that his Potions teacher is completely evil. In actuality, though, it is the seemingly benevolent Professor Quirrell who is doing the bidding of Lord Voldemort. The concepts of good and evil are too complex to be expressed in black-and-white terms, and every character has some element of good and evil in their nature. The problem is, Rowling suggests, how a battle can be fought between good and evil when the lines between the two are so blurry.Rowling does not argue in favor of ignoring all rules and regulations. Many of the rules at Hogwarts are instituted in order to protect the students; for example, the rule that prohibits students from going to the forbidden third-floor corridor ensures that students are not attacked by the three-headed dog. At the same time, however, Rowling realizes that rules must