How we cite our quotes: (Chapter.Narrator.Paragraph)
Quote #7
Knights are sworn to defend the weak, protect women, and fight for the right, but none of them did a thing. Only Ser Dontos had tried to help, and he was no longer a knight, no more than the Imp was, nor the Hound… the Hound hated knights… I hate them too, Sansa thought. They are no true knights, not one of them. (33.Sansa.52)
Sansa thought a knight's function was to do all the stuff mentioned above, but the knights of the Kingsguard feel their duty is to do what the king says. All that other stuff is, ah, just the small print.
Quote #8
"The greater part of his foot remains at Bitterbridge." Varys abandoned the brazier to take his seat at the table. "Most of the lords who rode with Lord Renly to Storm's End have gone over banner-and-blade to Stannis, with all their chivalry." (37.Tyrion.16)
So much for their honor bound duty to Renly's cause… Guess they figured their duty was transferable.
Quote #9
"So many vows… they make you swear and swear. Defend the king. Obey the king. Keep his secrets. Do his bidding. Your life for his. But obey your father. Love your sister. Protect the innocent. Defend the weak. Respect the gods. Obey the laws. It's too much. No matter what you do, you're forsaking one vow or the other." [Jaime] took a healthy swallow of wine and closed his eyes for an instant, leaning his head back against the patch of nitre on the wall. (56.Catelyn.136)
And Jaime nails it. The crux of duty in A Clash of Kings is that it's too much. We see this with Catelyn, Renly, and a bunch of other characters. If all duty is created equal, then how do you choose? And if it's not created equal, then how do you know?