What does the fog symbolize in Long Day s Journey into Night

The fog in Long Day's Journey into Night symbolizes the characters' inability to see clearly and understand their own lives and relationships. It represents their confusion, uncertainty, and the emotional distance that exists between them. The fog also serves as a metaphor for the characters' addiction, which clouds their judgment and prevents them from facing their problems head-on. Additionally, the fog represents the past, which haunts the characters and prevents them from moving forward.