How we cite our quotes: (Book.Chapter.Paragraph)
Quote #4
'On the contrary; she's pleased with it as with his capacity to do this kind of thing—more than she has been pleased with anything for a long time. But she wants him to show it there. He has no right to waste it on the likes of us.' (10.1.7)
Bilham tells Strether that Sarah Pocock is lying when she says she doesn't approve of Chad's transformation. On the contrary, she approves of it way too much. But her duties are still to Woollett, and she wants Chad to return there so that the small town can enjoy the full benefit of his new charm.
Quote #5
'[W]hat is it you conduct but an outrage to women like us? I mean your acting as if there can be a doubt—as between us and such another—of his duty?' (10.3.10)
Sarah Pocock is downright offended at Strether's suggestion that Chad might have a personal duty to both his family and Madame de Vionnet. For Sarah, Chad's only duty is to his family because his family (including Sarah) is the moral center of the universe. As you can see, Sarah may just be a tad prejudiced. But this prejudice gives her a really strong idea of what she thinks is Chad's duty.
Quote #6
'My instructions from Mrs. Newsome are, if you please, my affair. You know perfectly what your own were, and you can judge for yourself of what it can do for you to have made what you have of them.' (10.3.10)
Sarah calls Strether out pretty hard-core for neglecting his duties to Mrs. Newsome. He was sent to Paris with a very clear job to do, but now he's doing the exact opposite of that job by trying to convince Chad to stay in Paris. By the by, let's not forget that Mrs. Newsome pays Strether's salary. It makes sense that Sarah would think Strether has a duty toward her mother. That and the whole being engaged thing.