Jess's dad consoling a sobbing Jess as he wonders if Leslie, as died without baptism, is going to hell. And encouraging Jess to remember all of things Leslie taught him.
Also telling him that Leslie didn't go to hell.
The very end, when Jess brings Maybelle to Terabithia.
Jess's thoughts near the end of the book, as he accepts Leslie's death.
For hadn't Leslie, even in Terabithia, tried to push back the walls of his mind and make him see beyond to the shining world—huge and terrible and beautiful and very fragile? (Handle with care—everything—even the predators.)
Now it was time for him to move out. She wasn't there, so he must go for both of them. It was up to him to pay back to the world in beauty and caring what Leslie had loaned him in vision and strength.