check out our:
"My reasons for marrying are, first, that I think it a right thing for every clergyman in easy circumstances (like myself) to set the example of matrimony in his parish; secondly, that I am convinced that it will add very greatly to my happiness; and thirdly—which perhaps I ought to have mentioned earlier, that it is the particular advice and recommendation of the very noble lady whom I have the honour of calling patroness. […] But the fact is, that being, as I am, to inherit this estate after the death of your honoured father (who, however, may live many years longer), I could not satisfy myself without resolving to choose a wife from among his daughters, that the loss to them might be as little as possible, when the melancholy event takes place—which, however, as I have already said, may not be for several years. This has been my motive, my fair cousin, and I flatter myself it will not sink me in your esteem. And now nothing remains for me but to assure you in the most animated language of the violence of my affection. […]" (19.9)
Mr. Collins's marriage proposal just keeps going on and on and on. It's all practicality. And it's the worst marriage proposal we have ever heard.
"My situation in life, my connections with the family of de Bourgh, and my relationship to your own, are circumstances highly in my favour; and you should take it into further consideration, that in spite of your manifold attractions, it is by no means certain that another offer of marriage may ever be made you. Your portion is unhappily so small that it will in all likelihood undo the effects of your loveliness and amiable qualifications. As I must therefore conclude that you are not serious in your rejection of me, I shall choose to attribute it to your wish of increasing my love by suspense, according to the usual practice of elegant females." (19.17)
It is literally impossible for us to understand why Mr. Collins's helpful pro-con list didn't convince Lizzy to marry him immediately.