Hareton: defends Cathy to Heathcliff.
Heathcliff: is about to strike Cathy, but realize she is the embodiment of Catherine. The resemblance and Hareton's romance with her is tormenting Heathcliff.
Image Connection: Toby Keith and his song "I am not as good as I once was" describes this chapter to me. Heathcliff has lost his luster, and his appetite for revenge, He just does not want it anymore.