1. "A retaliator behaves like a hawk when he is attacked by a hawk, and like a dove when he meets a dove. When he meets another retaliator he plays like a dove. A retaliator is a conditional strategist. His behaviour depends on the behaviour of his opponent."
- Richard Dawkins, The Selfish Gene
2. "Retaliation does not balance things, since it harms the soul of the retaliator and creates a more severe imbalance. Socrates noticed this peril and wrote: It is better to suffer an injustice than to commit one. This is because the body and mind are damaged by injustice from others, but it is our own soul that is damaged by revenge. A spiritually evolved adult is not cutthroat and does not believe that all is fair in love and war. He does not claw his way to the top but acts kindly at any rung of the ladder. He has personal ambition but not at the expense of others. This is an example of a moral standard becoming more important than success in the material world. The joy of a good conscience is the highest value for those who want to grow spiritually. With spiritual practice, our attitude toward an aggressor becomes compassion for the suffering dimension in his aggression. This response also serves to quiet him down."
- David Richo, The Five Things We Cannot Change: And the Happiness We Find by Embracing Them