Principles Quotes in A Game of Thrones

How we cite our quotes: (Absolute Chapter, Character Name, Chapter.Paragraph)

Quote #1

The order had been given, and honor bound them to obey. (1 Prologue.43)

Waymar Royce may be an idiot, but he is the commander of the patrol in the Prologue; so when he gives an order, the only thing Will and Gared can do is obey. (Although, now that you've read the book, you know that Gared becomes an oathbreaker; does that make you read this differently?)

Quote #2

"The Night's Watch is a sworn brotherhood. We have no families. None of us will ever father sons. Our wife is duty. Our mistress is honor." (6 Jon 1.41)

What does Benjen mean when he says "Our wife is duty. Our mistress is honor"? Is following honor a form of Night Watch adultery? Does this mean that duty comes first?

Quote #3

"He swore a vow to protect his king's life with his own. Then he opened that king's throat with a sword." (13 Eddard 2.58)

Jaime Lannister broke his oath to protect the king by, you know, killing the guy. He clearly spat in the face of duty, and we don't see much honor in it either. So was he following his own set of principles? Or is he completely without principles?