This quote is wrong. It's "to die would be an awfully big adventure" and it was used in a disney version of Peter Pan just not the cartoonx Peter Pan.although this quote isn't from the Disney movie btw.
"She believed in dreams, all right, but she also believed in doing something about them. When Prince Charming didn't come along, she went over to the palace and got him." ~ Walt Disney quote about Cinderella