"As Charlotte Brontë, Emily's older sister, wrote, "Heathcliff, in deed, stands unredeemed", which adds to the uncertainty over whether he not only repented for his sins but was actually a real human being after all; since Lockwood's vision of Catherine at the window was preceded by a dream of a fire-and-brimstone sermon in a church, it is possible that both Heathcliff and Catherine are damned; Catherine herself expresses doubt as to whether she could ever be admitted into Heaven.