| Quote #7
"I mean the difference is not enough. Like being born with perfect pitch, or being born very ordinary and then winning the Congressional Medal of Honor or getting an Academy Award. Those are differences that will last a lifetime. Finding out about Angel will be that kind of difference." (6.80)
Claudia's main goal in life is to be different. Venturing into the great unknown (of the Met—not to mention art history) is her way of trying to change herself. Jamie, on the other hand, just wants to have fun.
| Quote #8
Her hopes centered more than ever on Box 847 in the post office. […] Claudia was prepared to be the discoverer of great truths. (8.32)
There's nothing wrong with self-confidence, right? Claudia has put all her eggs into this one basket (the basket of great art that is the angel statue) and she's pretty sure that it's going to bring her greatness and fame. It's going to make her different for sure.
| Quote #9
"I've been so busy worrying about Michelangelo and avoiding getting caught. If only you'd tell me if the statue was done by Michelangelo. Then I would feel that I could go home again." (9.131)
Claudia is so dead-set on achieving this goal (of finding out whether Michelangelo made a statue) that it's brought her all the way to Mrs. Frankweiler's home. For someone who's so concerned with good manners, she's sure willing to throw them out the window in order to get some answers.