What would it mean to live forever? Well, we learn in Tuck Everlasting that everyone has a different answer to that question. (We're guessing you do, too.) The what-does-it-all-mean voice that carries the most in the novel is Tuck's, who thinks that no death means no life.
As soon as she meets the Tucks, Winnie is plunged into a world filled with philosophical questions about life and existence. She may have a lot of guidance, but she finds herself having to come up with answers in a very personal way.
The characters that are immortal in Tuck Everlasting (yep, the Tucks) experience life in a different way than everyone else.
The twenty-four hours we witness of Winnie's life are the most important of her existence—that's why we don't get to see the rest.