From Emma by Jane Austen, Chapter 31, the last paragraph:
"There is no charm equal to tenderness of heart," said she afterwards to herself. "There is nothing to be compared to it. Warmth and tenderness of heart, with an affectionate, open manner, will beat all the clearness of head in the world, for attraction, I am sure it will. It is tenderness of heart which makes my dear father so generally beloved—which gives Isabella all her popularity.—I have it not—but I know how to prize and respect it.—Harriet is my superior in all the charm and all the felicity it gives. Dear Harriet!—I would not change you for the clearest-headed, longest-sighted, best-judging female breathing. Oh! the coldness of a Jane Fairfax!—Harriet is worth a hundred such.—And for a wife—a sensible man's wife—it is invaluable. I mention no names; but happy the man who changes Emma for Harriet!" [emphasis mine]
What does the last sentence mean? Does it mean "I wish the man who changes Emma for Harriet to be happy" or does it mean "The man who changes Emma for Harriet is happy"?
What does "changes Emma for Harriet" mean? Does it mean "make Emma a better person for Harriet"?
And if you've read the book, who does "the man" refer to? My guess is Mr. Elton because he made Emma see some very good sides in Harriet and appreciate her much more. But I'm not sure if this was what the author meant.