Quote 25
HELMER: "Hasn't Miss Sweet Tooth been breaking rules in town today? […] taken a bite at a macaroon or two?"
NORA: "No, Torvald." (1.55-1.62)
Nora lies on about every page of the play. This is the first one of which the audience is aware. It seems pretty innocent to lie about cookies, but it hints at a much larger gulf in their marriage.
Quote 26
HELMER: "My little songbird must never do that again. A songbird must have a clean beak to chirp with—no false notes!" (1.435)
The danger of Torvald finding out about Nora's deceit is the essential tension that drives most of the play.
Quote 27
HELMER: "A guilty man like that has to lie and […] has to wear a mask in the presence of those near and dear to him, even before his own wife and children. […] the children—that is the most terrible part of it all, Nora." (1.467)
It's ironic that Torvald is saying this in front of his wife, who has deceived him so often.