(Does that make me a better speaker than Catherine Morland?) In the first point, we actually agree. I neither said nor meant that Darcy was thinking of himself when he mentioned those sentiments of Lizzy's. Of course he was wanting to shield her from being harmed by Wickham. What I did say was that, in Darcy's mind (and this is conjecture, as the ON doesn't tell us), her prejudice has its root in her feelings for Wickham. This doesn't mean Darcy thinks he can--or will try to--win her over if he tells her the truth about Wickham. I was not assigning him a motive, but having him assign one to her.

Lizzy herself ends her reflections by saying, Had I been in love, I could not have been more wretchedly blind. But vanity, not love, has been my folly. Pleased with the preference of one, and offended by the neglect of the other, on the very beginning of our acquaintance, I have courted prepossession and ignorance, and driven reason away, where either were concerned. Till this moment I never knew myself.