It gives her a scapegoat--an outside, personal, attackable cause for the limitations and defeats she suffers.

And there is no greater consolation than fixing blame.

It is half a cure in itself to know or to think you know the cause of your difficulties.

Moreover, it gives her a scapegoat against whom it is easy to make up a case.

She knows him too well, much better than he knows her, much better than she knows herself; at least her knowledge of him is better formulated.