Heathcliff wanting revenge/ "Wuthering Heights"

"There was scarcely time to experience a thrill of horror before we saw that little wretch was save."  This was said when Catherine was bit by the dog, and the Linton's would not allow Heathcliff to come because he looked dirty and not good enough.  Also, one night the Linton's came to the Earnshaw's one night for dinner.  Hindly decided to lock Heathcliff up in the attic.  He did this because he thought that Heathcliff was not good enough and looked dirty.  Well, Heathcliff finally decided that he had enough, and left Wuthering Heights.  Now he is back, and I think he is searching for revenge.  This shows that people need to treat people like they want to be treated because things could not turn out so well.  I wonder what Heathcliff is going to do to get his revenge.