In chapter 47, we have a fine sample of Mary's philosophical speeches that reads as follows:
Unhappy as the event must be for Lydia, we may draw from it this useful lesson: that loss of virtue in a female is irretrievable -- that one false step involves her in endless ruin -- that her reputation is no less brittle than it is beautiful -- and that she cannot be too much guarded in her behaviour towards the undeserving of the other sex.
Elizabeth lifted up her eyes in amazement, but was too oppressed to make any reply.
I wonder at Lizzy being so amazed. Was not she aware that Mary was likely to give such pathetic lessons to her sisters? Or was she simply amazed at Mary's "opportunism" (for lack of a better word) in showing off her moral eloquence, without any real concern for Lydia? I find it somewhat hard to believe that Elizabeth should be so little acquainted with her sister's character. It seems to suggested that she never did care very much about her...