In this last conjecture of Deronda's he was not wrong as to the quality in Mirah's nature on which he was founding--the latent protest against the treatment she had all her life being subject to until she met him. For that gratitude which would not let her pass by any notice of their acquaintance without insisting on the depth of her debt to him, took half its fervor from the keen comparison with what others had thought enough to render to her. 
In this last conjecture Deronda was not wrong about how much Mirah valued being treated with equality. Her gratitude to him was all the greater because of the contrast of his behaviour with the treatment she had been used to in her former life. 