Hindley Earnshaw is brutal to the foundling, Heathcliff, and degrades him. Heathcliff, when his hour comes, pays back his wrong with the interest due. He is brutal beyond brutality to Hindley Earnshaw, and he degrades Hareton, Hindley's son, as he himself was degraded; but he is not brutal to him. The frustrated passion of Catherine Earnshaw for Heathcliff, and of Heathcliff for Catherine, hardly knows itself from hate; they pay each other back torture for torture, and pang for hopeless pang. When Catherine marries Edgar Linton, Heathcliff marries Isabella, Edgar's sister, in order that he may torture to perfection Catherine and Edgar and Isabella. His justice is more than poetic. The love of Catherine Earnshaw was all that he possessed. He knows that he has lost it through the degradation that he owes to Hindley Earnshaw. It is because an Earnshaw and a Linton between them have robbed him of all that he possessed, that, when his hour comes, he pays himself back by robbing the Lintons and the Earnshaws of all that _they_ possess, their Thrushcross Grange and Wuthering Heights. He loathes above all loathely creatures, Linton, his own son by Isabella. The white-blooded thing is so sickly that he can hardly keep it alive. But with an unearthly cruelty he cherishes, he nourishes this spawn till he can marry it on its death-bed to the younger Catherine, the child of Catherine Earnshaw and of Edgar Linton. This supreme deed accomplished, he lets the creature die, so that Thrushcross Grange may fall into his hands. Judged by his bare deeds, Heathcliff seems a monster of evil, a devil without any fiery infernal splendour, a mean and sordid devil.