More evidence of Elizabeth's immunity to Lady Russell's rational influence/persuasion:

Lady Russell, indeed, had scarcely any influence with Elizabeth, and seemed to love her, rather because she would love her, than because Elizabeth deserved it. She had never received from her more than outward attention, nothing beyond the observances of complaisance; had never succeeded in any point which she wanted to carry, against previous inclination. She had been repeatedly very earnest in trying to get Anne included in the visit to London, sensibly open to all the injustice and all the discredit of the selfish arrangements which shut her out, and on many lesser occasions had endeavoured to give Elizabeth the advantage of her own better judgement and experience; but always in vain: Elizabeth would go her own way; and never had she pursued it in more decided opposition to Lady Russell than in this selection of Mrs Clay; turning from the society of so deserving a sister, to bestow her affection and confidence on one who ought to have been nothing to her but the object of distant civility.