How does the metaphor of the rattrap serve to highlight the human predicament?

Explanation

The metaphor of the rattrap signifies that the world exists only to trap people by setting baits for them.
Whenever someone is tempted by the luxuries, he ends up being caught in a dangerous trap. The author, thus, makes a much deeper comment on the woeful plight of those in pursuit of the worldly pleasures, which often lead them to unfortunate situations. The story helps in realising the importance of general goodness and kindness. The peddler is saved from the snare of the huge rattrap called world only when he appreciates the kindness to him by Edla.