"How is the soul profited by the strife of Hector, the arguments of Plato, the poems of Virgil, or the elegies of Ovid, who, with others like them, are now gnashing their teeth in the prison of the infernal Babylon, under the cruet tyranny of Pluto?"

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He must be able to hear them [the counter arguments] from persons who actually believe them; who defend them in earnest, and do their very utmost for them. He must know them in their most plausible and persuasive form; he must feel the whole force of the difficulty which the true view of the subject has to encounter and dispose of; else he will never really possess himself of the portion of truth which meets and removes that difficulty.

— John Stuart Mill