'And I desire that my […] sister may be informed, by means of a true copy of this, the third and last clause of my Will, that I give the Diamond to her daughter Rachel, in token of my free forgiveness of the injury which her conduct towards me has been the means of inflicting on my reputation in my lifetime; and especially in proof that I pardon, as becomes a dying man, the insult offered to me as an officer and a gentleman, when her servant, by her orders, closed the door of her house against me, on the occasion of her daughter's birthday.' (22.214.171.124)
We're meant to believe that Lady Verinder is sincerely "a Christian woman" when she gives Rosanna a second chance. But John Herncastle's Will, in which he claims repeatedly that he forgives his sister for the "insult" of not inviting him to Rachel's birthday party, is meant to sound insincere. After all, he knew that the Indians were after the Moonstone and that it would be dangerous for Rachel to be in possession of it. This is the first example of a character using religion for hypocritical, self-serving reasons in this novel.