27 As a human person he is entitled to the legal protection of his rights, and such protection must be effective, unbiased, and strictly just. To quote again Pope Pius XII: "In consequence of that juridical order willed by God, man has his own inalienable right to juridical security. To him is assigned a certain, well-defined sphere of law, immune from arbitrary attack."(24)
Source: Pacem in Terris (Vatican.va)