What were the problems throughout chapter 5?

David also has difficulty understanding why Carlo and the other children don't appreciate all they have. At one point, he refuses to play a game involving prisoners and jailers, and attempts to explain to the others why playing such a game is evil, but ultimately fails to make them understand. At another point, Maria shows him a globe, and David is dismayed to see how far away Denmark is.

One night, as David is making plans to leave and continue on his journey, he overhears Giovanni and Elsa talking about him. Elsa says she will always be grateful to David for saving Maria's life but comments that she's afraid of him, doesn't understand him, is worried about the things he says to Maria about evil being in the world, and how Carlo is becoming more and more unhappy.

David packs up all his belongings, and writes a letter explaining why he is leaving and saying that he is revealing all he will ever voluntarily reveal.