Emma - chapter 47

With insufferable vanity she had believed herself in the secret of everybody's feelings; with unpardonable arrogance proposed to arrange everybody's destiny. She was proved to have been universally mistaken, and she had not quite done nothing, for she had done mischief.

... she perceived that she had acted most weakly; that she had been imposed on by others in a most mortifying degree; that she had been imposing on herself in a degree yet more mortifying; that she was wretched, and shall probably find this day but the beginning of wretchedness.

She saw that in persuading herself, in fancying, in acting to the contrary, she had been entirely under a delusion, totally ignorant of her own heart, ...