I hoot all through this proposal, and to Elizabeth's credit - or maybe she's just her father's daughter - she is also "divided between distress and diversion. "

There are lots of funny and outrageous statements in Mr Collins's speech. My favorite bit is

your wit and vivacity, I think, must be acceptable to her, especially when tempered with the silence and respect which her rank will inevitably excite. (ch. 19)

Yes. "wit and vivacity" is often "tempered with silence."