"To improve both sexes they ought, not only in private families, but in public schools, to be educated together. If marriage be the cement of society, mankind should all be educated after the same model, or the intercourse of the sexes will never deserve the name of fellowship."

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For there is but one essential justice which cements society, and one law which establishes this justice. This law is right reason, which is the true rule of all commandments and prohibitions. Whoever neglects this law, whether written or unwritten, is necessarily unjust and wicked.

— Marcus Tullius Cicero