If the excerpt is this:
HELMER: Don't disturb me. (A little later, he opens the door and looks into the room, pen in hand.) Bought, did you say? All these things? Has my little spendthrift been wasting money again?
NORA: Yes but, Torvald, this year we really can let ourselves go a little. This is the first Christmas that we have not needed to economise.
Then the answer would be obedience and control, and the importance of money.