To put it in the terms of St. Thomas Aquinas: An unjust law is a human law that is not rooted in eternal law and natural law.
Martin Luther King, Jr.No man (sic) has learned to live until he can rise above the narrow confines of his individualistic concerns to the broader concerns of all humanity. Length without breadth is like a self-contained tributary having no outward flow to the ocean. Stagnant, still and stale, it lacks both life and freshness. In order to live creatively and meaningfully, our self-concern must be wedded to other concerns.
Martin Luther King, Jr.