The Theme of Choice vs. Destiny
Harry Potter and the Chamber of SecretsHarry Potter grapples with his connection to Salazar Slytherin and the Sorting Hat's initial suggestion, learning that his choices define him.
increasing
Bearing strength in each event
decreasing
The Sorting Hat's Suggestion

A Whisper of Darkness
The Hat's Words
In Harry's first year, the Sorting Hat considered placing him in Slytherin. Harry vehemently rejected it, and the Hat placed him in Gryffindor. This memory haunts Harry when he learns he is a Parselmouth.
The Echo of Slytherin
When Harry speaks Parseltongue, students suspect he is the Heir of Slytherin. He begins to doubt himself, wondering if the Hat was right about him having Slytherin traits.
The Inner Conflict
Harry's internal struggle is a central theme. He fears that he might be like Tom Riddle, but he chooses to fight against that possibility, proving that his choices matter more than his abilities.
Dumbledore's Lesson on Choice

The Headmaster's Wisdom
The Conversation
After the battle, Dumbledore explains to Harry that the Sorting Hat placed him in Gryffindor because he asked to be there. He tells Harry, "It is our choices, Harry, that show what we truly are, far more than our abilities."
The Sword of Gryffindor
Dumbledore shows Harry the sword he pulled from the hat, engraved with Godric Gryffindor's name. Only a true Gryffindor could have done that. Harry's choice to reject Slytherin made him worthy.
The Resolution
Harry feels a sense of peace. He is not destined to be evil; he has the power to choose his path. This lesson is the core of the theme and clarifies Harry's identity.
during Harry's first year, recalled in this year
after the Chamber of Secrets, late May