Justice is one of the four cardinal virtues in classical European philosophy and Roman Catholicism. It is the moderation or mean between selfishness and selflessness — between having more and having less than one's fair share.: V.3 Justice is closely related, in Christianity, to the practice of charity because it regulates relationships with others. It is a cardinal virtue, which is to say that it is "pivotal", because it regulates all such relationships. It is sometimes deemed the most important of the cardinal virtues. Source: Wikipedia (en)