Quote 1
"You are just as bad as your no-account brother," she finally said. "Selfish and thoughtless. It must come from the Gokey side, because it doesn't come from the Robertsons. What on earth can you be thinking? Leaving your sisters when they need you? And for a terrible place like New York!" She nodded at the figurine I was clutching. "Pride. That's very fitting. Pride goeth before a fall. You're on a very high horse, Mathilda. I don't know who put you there, but you'd best get down off it. And fast." (12.UriahtheHittite,stinkpot,warthog.61)
Aunt Josie often functions as the mouthpiece for social values in the novel, so what we hear coming out of her mouth is often what other people around her think. But Aunt Josie latches on to Mattie's conflict: abandon her sisters and Pa for her dream, or stay and fulfill the responsibilities dictated to her by her gender and social norms.
Quote 2
"He was attacked," John said. "In front of the station. The train was late. I went to talk to the stationmaster and left Weaver in the wagon. Three men came out of the Summit Hotel. Trappers. They were drunk. They said some things. Weaver answered back. One of them hauled him out of the seat and all three of them beat him. I heard the noise, ran out, and broke it up."
"Three to one, Weaver? For God's sake, why didn't you just keep quiet?"
"They called me n*****." (31.limicolous.15-17)
Significantly, the beating takes place off-page, which places the focus of the event on Weaver's reaction and others' reactions. There's very little emotion in the description of the event. Though Mr. Sperry wonders why Weaver can't keep his mouth closed, we know that Weaver would never passively accept racist remarks heaped upon his person. He's too righteous for that, and although he has been physically beaten, his spirit has not.
Quote 3
"I don't want no part of baby word games," Lou grumbled.
"Any, Lou. Any part," I snapped. Her carelessness with words made me angrier than her dirty mouth and the filthy state of her coveralls and the manure she'd tracked in, combined. (2.fractious.57-58)
It's pretty clear where Mattie's values lie: with language. Here we see her place importance on how others judge someone by the way that person communicates, an idea that we'll see again with her siblings and with Weaver. Of much less importance is Lou's physical appearance. Clearly Mattie values a person's mind and words over their physical characteristics… well, most of the time (ahem, Royal Loomis).