1 Thessalonians 5:15- "See that no one repays another with evil for evil, but always seek after that which is good for one another and for all men."
I know you've heard this before, and it isn't hard to do.  But the Lord wants us to live with a spirit of love and forgiveness.  When someone wrongs you, forgive them, and repay them with good.  My experience has been that however you treat others, that is how you will be treated.  So, very simply, always focus on doing good, and never seek revenge, repaying evil for evil.
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