some quotes with line number the question'symbol(nature vs culture) in wuthering heights

"Doubtless Catherine marked the difference between her friends, as one came in and the other went out. The contrast resembled what you see in exchanging a bleak, hilly, coal country for a beautiful fertile valley; and his voice and greeting were as opposite as his aspect."

- Emily Bronte, Wuthering Heights, Ch. 8

"It would degrade me to marry Heathcliff now; so he shall never know how I love him: and that, not because he's handsome, Nelly, but because he's more myself than I am. Whatever our souls are made of, his and mine are the same; and Linton's is as different as a moonbeam from lightning, or frost from fire."

- Emily Bronte, Wuthering Heights, Ch. 9