Concept:
• The use of irony and contrast highlights the wretchedness of a character's usual existence.
• A single exception ("a day of peace") underscores the constant rule (a life of unrest).
Step 1: Contextualize the "day of peace" within the stranger's routine
By wishing him "a day of peace," Edla implicitly highlights that his entire year is normally filled with strife, fear, and turmoil.
He lives a life of constant alertness, having to "walk and walk" and stay one step ahead of the law or hostile people.
Step 2: Infer the psychological state of the stranger
The line highlights that the stranger’s life is perpetually insecure.
He is a man who is exhausted by the "rattrap" of the world, never knowing a moment of true hospitality or mental rest. This single day of proposed peace serves as a stark contrast to his standard life of persecution.