How we cite our quotes: (Chapter.Paragraph)
Quote #4
"Anyone as selfish and determined as you are is never helpless. God help the Yankees if they should get you." (23.55)
Rhett is telling Scarlett that she has enough gumption for anything… and he's more or less right. When a Yankee does show up to get her, the Yankee ends up dead. Don't trifle with Scarlett, is the message here.
Quote #5
"She thought without surprise, looking down from her height, that her shoulders were strong enough to bear anything now, having borne the worst thing that could ever happen to her." (23.281)
This is when Scarlett has escaped Atlanta and come back to Tara to find her mother dead and Gerald broken. This isn't necessarily the worst that will ever happen to her, but she's more or less right; her shoulders are strong enough to bear anything. Rhett's shoulders aren't necessarily, though.
Quote #6
I won't be a big-mouthed fool, she thought grimly. Let others break their hearts over the old days and the men who'll never come back. (38.3)
Scarlett is determined to work with the Yankees if she has to, and her refusal to look back is seen as part of her strength. She doesn't get hung up on memory… except for Ashley's memory, maybe.