There is a written and an unwritten law. The one by which we regulate our constitutions in our cities is the written law; that which arises from custom is the unwritten law.

Νόμου διαιρέσεις δύο: ὁ μὲν γὰρ αὐτοῦ γεγραμμένος, ὁ δὲ ἄγραφος. ᾧ μὲν ἐν ταῖς πόλεσι πολιτευόμεθα, γεγραμμένος ἐστίν. ὁ δὲ κατὰ ἔθη γινόμενος οὗτος ἄγραφος καλεῖται:

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Original Citation

Plato. Quoted in Lives and Opinions of Eminent Philosophers, written by Diogenes Laertius. c. 240 AD, bk. 3, sect. 86.

Current Citation

Plato. Quoted in The Lives of Eminent Philosophers, written by Diogenes Laërtius, translated by Pamela Mensch, edited by James Miller. Oxford University Press, 2018, bk. 3, sect. 86.