“Yes, you came swiftly, dragging me at your chariot wheels. Scarlett, sometimes I have an impersonal curiosity as to what would have happened to me without you.”
So he does realize how much he owes her. That imagery is interesting too. Slaves and war spoils were carried at the wheels. Given Ashley's penchant for over-blown analogies, this is likely on purpose.
“Did you ever stop to think, Scarlett, that Rhett and I are fundamentally alike?”
“Oh, no! You are so fine, so honorable and he —” She broke off, confused.
“But we are. We came of the same kind of people, we were raised in the same pattern, brought up to think the same things. And somewhere along the road we took different turnings. We still think alike but we react differently. As, for instance, neither of us believed in the war but I enlisted and fought and he stayed out till nearly the end. We both knew the war was all wrong. We both knew it was a losing fight, I was willing to fight a losing fight. He wasn’t. Sometimes I think he was right and then, again — ”