Quote proving that the boy realizes that he has to take care of himself?

I’m scared, he said. Do you understand? I’m scared.
The boy didnt answer. He just sat there with his head bowed, sobbing.
You’re not the one who has to worry about everything.
The boy said something but he couldn’t understand him. What? he said.
He looked up, his wet and grimy face. Yes I am, he said. I am the one.”

The above quote foreshadows the man's death, and the boy's knowledge that he will be the one who has to "worry about everything".