Everyone sees the world a little differently. The way Leslie sees the world in “Terabithia” is so magical that Jess falls in love with it. Jess wants to be like her, to see the world she sees, but when she dies it is as if the world she saw dies too.
But he does not want that world to die. He wants it to live on. And so he must become her, in a sense. He can change the world he sees, too, and by doing that she will live on in him.
We all have our own self-image. We all believe certain things about ourselves to be true, and understand that certain behaviors are more true to our selves than others. But when we love someone who behaves differently, who has a different image of themselves and the world, sometimes we decide we want to change. We want to become what we love.
In this way, death becomes a limited thing. In “Bridge to Terabithia,” Leslie’s death forces Jess to change, makes her a part of him in a way he isn’t even aware of. In “Little Women,” when Beth dies, Jo consciously shapes herself to act and be more like her dead sister.
What is loved cannot die. Not as long as we love it.