How do the final paragraphs of chapter 6 set up chapter 7?

Slowly, Victor is returning to his old, carefree self. He takes great joy in the natural world, and is able to forget his former misery. The two are in high spirits upon their return to university. Victors happiness can only be temporary. His abandonment of the creature can only lead to disaster. Within this context, it foreshadows the death of his brother in chapter 7.