Stendhal said this quote

“ Mathilde made an effort to use the more intimate form; she was evidently more attentive to this unusual way of speaking than to what she was saying. This use of the singular form, stripped of the tone of affection, ceased, after a moment, to afford Julien any pleasure, he was astonished at the absence of happiness; finally, in order to feel it, he had recourse to his reason. He saw himself highly esteemed by this girl who was so proud, and never bestowed unrestricted praise; by this line of reasoning he arrived at a gratification of his self-esteem. ”