Well, the longer he tried to feel his memory, the more he realized it was underwhelming. Something had to be going right, though — he'd produced a silver wisp alongside Miss Crawford. After he'd really realized he was head boy (which was after he'd awoken the next morning, if he remembered properly), he'd had some ounce of hope that everything would be alright. He'd had a reason to keep moving forward. It had been hope. Once again, he cast: "Expecto patronum!"