"One who is injured ought not to return the injury, for on no account can it be right to do an injustice; and it is not right to return an injury, or to do evil to any man, however much we have suffered from him"

This quote by Socrates speaks to the value of justice and fairness in our interactions with others. He is stating that even if we have actually been wronged or hurt by someone, it is never ever right to return the injury or do wicked to them in return. He is advocating for a moral code of conduct that is based upon justice and fairness, rather than revenge or retaliation. He is recommending that we ought to not enable our feelings to determine our actions, but instead strive to be directed by concepts of justice and fairness. This quote is a suggestion that we should make every effort to treat others with regard and compassion, even if they have actually mistreated us in the past. It is a tip that we must not enable our emotions to cloud our judgement, however rather make every effort to be directed by principles of justice and fairness.