Attacked or Attacking?

Do you ever feel you are being attacked? Do you every do the attacking?  In 2 Samuel 16 David was attacked by Shimei.  The attack involved bad words, cruel works & lies.  So how should we respond?  I know how we want to respond but the Bible shows us a better way.  David responded by first saying not to harm his attacker.  His idea was if someone needed to be repaid for doing wrong then God would repay them. Second, when Shimei apologize for his actions David forgave him.  Some people thought that he was trying to save himself but David took it at face value.  We can't know a person's motives but God does.  David's response had an affect on others. Are you practicing the kind f forgiveness that Jesus preaches?