1 Peter 3:9 is what I like to call a seatbelt verse because it saves me from getting hurt. It says:
"Do not repay evil with evil or insult with insult. On the contrary, repay evil with blessing, because to this you were called so that you may inherit a blessing." - 1 Peter 3:9
For Christians, revenge is never the right option. Period. Peter echoes the teaching of Jesus, as well as that of Paul, in making it perfectly clear that those in Christ—those set apart to a new purpose—are not allowed to "get even."
The world believes that a person has the right to strike back in the same manner. They use evil to combat evil. In this they are just compiling sin upon sin. They are making the situation worse. It will usually continue to build, each person adding more to the fire. God does not work that way.
Jesus did not work in that manner when He walked on the earth. As Jesus was being whipped, beaten and nailed to the cross, He did not strike back physically or with words. He actually blessed the people asking God to forgive them. Believers are to pour out blessings upon those who do evil to them. It does not matter if the evil was done intentionally or by accident. Giving a blessing, is showing love–God’s love to the person.
In the end God will bless you greater than getting revenge will ever help you. Live as Jesus lived, not as the world does.