It is essential always to do good, regardless of who they are. Those who, for one reason or another, are not our friends cannot be excluded from our acts of kindness. According to Jesus’ example, if we love those who love us and bless those who bless us, what reward do we have? (Mt 5:46f). Doing good to those who do us wrong is more difficult than responding with harm; this approach is more likely to lead to the other person’s conversion than revenge.