summum ius, summa iniuria
supreme justice, supreme injustice
Notes
From Cicero (De officiis, I, 10, 33). An acritical application of law, without understanding and respect of laws's purposes and without considering the overall circumstances, is often a means of supreme injustice. A similar sentence appears in Terence (Heautontimorumenos, IV, 5): Ius summum saepe summa est malitia ("supreme justice is often out of supreme malice (or wickedness)").