The literary device that Ibsen uses is foreshadowing to increase the suspense in the audience. He uses this when Torvald is about to get the letter out of the mailbox and Nora does not really care anymore because he was going to find out sooner or later.
Lord let me face my fears, dry my tears, and know that you're never far away. Help me remember with you I am better than by myself I ever could be... Change doesn't start with a sea, it begins with me!!