Revengeful people.

“Before you embark on a journey of revenge, dig two graves.” ~Confucius

Revenge is defined as harm done to someone as a punishment for harm that they have done to you. When engaging in revengeful activity, in thought or deed, one takes on the responsibility for punishing another or others who, one feels, deserves just punishment for "making me feel bad, or wrong or deficient" in some way, shape or form. The bottom line is that acting on feelings of revenge can become dangerous. For many, revenge is like a drug, an addiction, the more one experiences it, they more they want to, and need to, experience it. So, initially, one needs to exact revenge on this individual, then that one, then this group and then that group in order to maintain the sense of feeling safe, secure and satisfied. So, unable to experience a true and real feeling of peace and security from inside, their addiction continues to tug at them; it's never ending; it's progressive, not unlike the drug, food, alcohol, or sex addict, who needs to score one more fix, and then another, and another to experience satisfaction or pleasure, while hiding and denying their deeper fears and insecurities that continue to live, fester and grow inside. For many, revenge becomes a way of life at work, at home, and in relationships. A lifelong self-sabotaging, self-limiting obsession.