In spiritual maturity, the opposite of injustice is not justice, but compassion. Not me against you, not me straightening out the present ill, fighting to gain a just result for myself and others, but compassion, a life that goes against nothing and fulfills everything.
Holy listening, to "listen" another's soul into life, into a condition of disclosure and discovery, may be almost the greatest service that any human being ever performs for another (or oneself).