For man, when perfected, is the best of animals, but, when separated from law and justice, he is the worst of all; since armed injustice is the more dangerous, and he is equipped at birth with the arms of intelligence and with moral qualities which he may use for the worst ends. Wherefore, if he have not virtue, he is the most unholy and the most savage of animals, and the most full of lust and gluttony. But justice is the bond of men in states.
From Aristotle’s argument that man is by nature a ‘political animal’ whose capacities for reason and speech make him best under law — and most dangerous without it.
✓Public domain
Aristotle’s Greek text is ancient and long in the public domain. The exact English wording is Benjamin Jowett’s translation, first published in 1885 (Jowett died 1893) — well before 1931 — so this translation is also in the public domain in the United States.
⚠ This reflects the original work, which is public domain. If your exact English wording comes from a specific modern translation, that translation may itself still be under copyright — check the edition you quote.