PURGATORIO, Episode 143. Virgil, Reason, Love, And The Roots Of Modern Ethics: PURGATORIO, Canto XVIII, Lines 49 - 75

Virgil offers a third discourse on love to show his work and to get close to an understanding of ethics. In doing so, he reaches into Aristotle’s logic of causality and attempts to come to terms with why humans behave they do. But even as he reaches back, he looks forward to our modern understanding of ethics.

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PURGATORIO, Episode 142. Questions Of Pregnancy And Blame: PURGATORIO, Canto XVIII, Lines 40 - 48

Virgil has finished his second discourse on love, showing the syllogistic work behind his first discourse. But Virgil must not be too good at rhetoric, because the pilgrim Dante has yet more questions, including one that is fundamental to any religious thinking.

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PURGATORIO, Episode 141. The Cognitive, Rational Basis Of Love: PURGATORIO, Canto XVIII, Lines 19 - 39

After the pilgrim’s request that Virgil show his work, the old poet condenses and recasts the basis of thinking in Western culture from its roots in Aristotle. But Virgil’s claims run into specific problems, which Dante the poet tries to solve in the way he knows best: with metaphor.

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PURGATORIO, Episode 140. Excuse Me, Virgil, I Didn't Quite Get That: PURGATORIO, Canto XVIII, Lines 1 - 18

Virgil seems to have reached a conclusion to his discourse on love in PURGATORIO, Canto XVII. But not for the pilgrim. And maybe not for Dante the poet. As Canto XVIII opens, we find the pilgrim asking Virgil to show his work to explain his seemingly air-tight syllogisms about human ethics.

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PURGATORIO, Episode 138. Love Escapes Virgil: PURGATORIO, Canto XVII, Lines 127 - 139

Virgil concludes his central discourse on love—the center of both PURGATORIO and indeed COMEDY as a whole—on a strangely ambiguous note. After so much certainty about how humans act and why the afterlife is set up as it is, he ends by saying, “I just don’t know”—a wildly discordant note amid so much “truth.”

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PURGATORIO, Episode 136. Love Is The Seed Of All You Do: PURGATORIO, Canto XVII, Lines 91 - 105

Virgil opens the central discourse of Dante’s COMEDY with his thesis on love: it’s the seed of all human action, good or bad. He then parses that thesis with scholastic reasoning, only to repeat the claim and come to rest at the conclusion. You’re in heaven or hell because of love!

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