"Having begun to love you, I love you for ever----in all changes, in all disgraces, because you are yourself. I ask no more. Then how can you, O my own husband, stop loving me?"
"I repeat, the woman I have been loving is not you."
"Another woman in your shape."
She perceived in his words the realization of her own apprehensive foreboding in former times. He looked upon her as a species of impostor; a guilty woman in the guise of an innocent one. Terror was upon her white face as she saw it; (...).
His air remained calm and cold, his small compressed mouth indexing his powers of self-control!(...).
Nothing so pure, so sweet, so virginal as Tess had seemed possible (...) up to an hour ago; but (...) the little less, and what worlds away!
(Hardy, Thomas (2008), Tess of the d'Urbervilles, eds. Juliet Grindle and Simon, Gatrell, Oxford UP, pp.248-249 & p.254)