What analysis would you give for the following quotes: " 'tis too much! by far too much. I do not deserve it. oh! why is not everybody as happy" and "her petticoat, six inches deep in mud"?

Louisa Hurst, Mr. Bingley's married sister, remarks on the appearance of Elizabeth Bennet's petticoat when Elizabeth arrives at Netherfield to check on her sister's health. Elizabeth has walked some three miles to get there rather than take the carriage, a more proper mode of transit for young women. Louisa laughs at Elizabeth, mocking her behind her back for her untidy appearance. Louisa and her sister, Caroline, think Elizabeth's behavior is shocking and improper, while their brother thinks that she looked quite healthy and well when she arrived. He applauds her affection for Jane. Louisa and Caroline care a great deal more about appearances and what is proper, and they care less about sisterly love and affection. Their relationship seems to be predicated on shared shallowness rather than common depth of feeling (as Elizabeth's and Jane's relationship is). This scene does a good job of showing the difference—as if we didn't already know—between the Bennet sisters and the Bingley sisters.
The other line is spoken by Jane Bennet after she has received and accepted Mr. Bingley's marriage proposal. This quotation shows her plainspoken sweetness by conveying three things: she's thrilled to be engaged to the man she truly loves, she feels unworthy of experiencing so much happiness, and she wishes that everyone in the world could feel as happy as she does. We see Jane's loving nature, her humility, and her goodwill toward humanity, all wrapped up in a line. This is her character in a nutshell.