My favorite line is "I am Ten Bears." Just the delivery...it was perfect...
The best line from Lone Watie:
Josey: Whenever I get to liking someone, they ain't around for long.
Lone Watie: I notice when you get to disliking someone, they ain't around for long neither.
"Endeavor to persevere" is also good, but you need the entire scene to get the context.