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Virtue is uniform, conformable to reason, and of unvarying consistency; nothing can be added to it that can make it more than virtue; nothing can be taken from it, and the name of virtue be left.

Marcus Tullius Cicero (1871). “Three Books of Offices ; Or, Moral Duties: Also His Cato Major, an Essay on Old Age; Laelius, an Essay on Friendship; Paradoxes; Scipio's Dream; and Letter to Quintus on the Duties of a Magistrate. Literally Translated, with Notes, Designed to Exhibit a Comparative View of the Opinions of Cicero, and Those of Modern Moralists and Ethical Philosophers”, p.273
Virtue is uniform, conformable to reason, and of unvarying consistency; nothing can be added to it that can make it more than virtue; nothing can be taken from it, and the name of virtue be left.