Suum cuique Suum cuique "" ( ), or "Unicuique suum", is a Latin phrase often translated as "to each his own" or "may all get their due". It has been significant in the history of philosophy and as a motto. The Latin phrase relates to an old Greek principle of justice which translates literally into English as "to each his own". Plato, in "Republic", offers the provisional definition that "justice is when everyone minds his own business, and refrains from meddling in others' affairs" (Greek: "...τὸ τὰ αὑτοῦ πράττειν καὶ μὴ πολυπραγμονεῖν δικαιοσύνη ἐστί...", 4.433a). Everyone should do according to his abilities
King in Prussia states acted largely as the rulers of sovereign states, and only acknowledged the emperor's suzerainty in a formal way. Hence, even though Brandenburg was still legally part of the empire and ruled in personal union with Prussia, it soon came to be treated as a "de facto" part of Prussia. On 17 January 1701, Frederick dedicated the royal coat of arms, the Prussian black eagle with the motto "suum cuique" imprinted. On 18 January, he crowned himself and his wife Sophie Charlotte in a baroque ceremony in Königsberg Castle. Even so, Frederick's move was controversial, and only became widely accepted