In the novel Wuthering Heights, Heathcliff, the main character is treated horribly as a young boy by the Earnshaw family. As he grows older, he plots revenge on those who treated him cruelly and their children--to the point where his vengeance consumes his every thought and action. Isabella, one of the characters who somehow escapes his cruelty, says, "Treachery and violence are spears pointed at both ends--they wound those who resort to them, worse than their enemies." That is exactly what happens to Heathcliff. He dies bitter and alone, while the children of his oppressors live a happy, fulfilled life. —Jim L. Wilson and Abigail Davis
Wuthering Heights by Emily Brontë, page 177.
Romans 12:19-21 (HCSB) (19) Friends, do not avenge yourselves; instead, leave room for His wrath. For it is written: Vengeance belongs to Me; I will repay, says the Lord. (20) But If your enemy is hungry, feed him. If he is thirsty, give him something to drink. For in so doing you will be heaping fiery coals on his head. (21) Do not be conquered by evil, but conquer evil with good.