“Revenge is the thinking man’s reflex, a complex blend of action and consistency no other animal species has so far succeeded in evolving. Evolutionary speaking, the practice of taking revenge has shown itself to the so effective that only the most vengeful of us have survived.”

“While it is true that most people never see or understand the difference they make, or sometimes only imagine their actions having a tiny effect, every single action a person takes has far-reaching consequences.”

“Never having been able to succeed in the world, he took his revenge by speaking ill of it.”

“If you believe that humans are animals, there can be no such thing as the history of humanity, only the lives of particular humans. If we speak of the history of the species at all, it is only to signify the unknowable sum of these lives. As with other animals, some lives are happy, others wretched. None has a meaning that lies beyond itself.”

“I joined the army to avenge the deaths of my family and to survive, but I've come to learn that if I am going to take revenge, in that process I will kill another person whose family will want revenge; then revenge and revenge and revenge will never come to an end...”

“The brain is a far more open system than we ever imagined, and nature has gone very far to help us perceive and take in the world around us. It has given us a brain that survives in a changing world by changing itself.”