Between friends there is no need for justice, but people who are just still need the quality of friendship; and indeed friendliness is considered to be justice in the fullest sense.
He only has freedom who ideally loves freedom himself and is glad to extend it to others. He who cares to have slaves must chain himself to them. He who builds walls to create exclusion for others builds walls across his own freedom. He who distrusts freedom in others loses his moral right to it.
Justice, voiceless, unseen, seeth thee when thou sleepest and when thou goest forth and when thou liest down. Continually doth she attend thee, now aslant thy course, now at a later time. These lines are from a section of doubtful or spurious fragments.
It is clear that those constitutions which aim at the common good are right, as being in accord with absolute justice; while those which aim only at the good of the rulers are wrong.