Commentary on Aristotle's Nicomachean Ethics

  • Year 1271 – 1272
  • Type Commentary
  • Genre philosophical commentary
  • Tradition Medieval Catholic
  • Original language Latin

Thomas Aquinas composed this systematic commentary on Aristotle's Nicomachean Ethics during his second tenure at the University of Paris, completing it around 1271-1272. The work emerged from Aquinas's broader project of synthesizing Aristotelian philosophy with Christian theology, part of his effort to demonstrate that reason and faith could work in harmony. Unlike his earlier works that relied heavily on Arabic commentators like Averroes, this commentary shows Aquinas engaging directly with Aristotle's Greek text through the new translation by William of Moerbeke.

Aquinas proceeds methodically through Aristotle's ten books, offering detailed analysis of each argument while weaving Christian insights throughout. He explores how Aristotle's conception of eudaimonia relates to Christian understandings of beatitude, arguing that while philosophical virtue can achieve a kind of happiness in this life, perfect happiness requires the vision of God. His treatment of the virtues shows particular sophistication, demonstrating how prudence governs the moral virtues and how friendship points toward divine love. Rather than simply Christianizing Aristotle, Aquinas shows genuine philosophical engagement, sometimes disagreeing with the Philosopher while respecting the integrity of his arguments. The commentary reveals Aquinas's conviction that natural reason can discover genuine moral truth, even as it requires divine revelation for completion.

This commentary became foundational for Catholic moral theology and remains influential in contemporary virtue ethics. Aquinas's synthesis shaped how subsequent Christian thinkers approached the relationship between philosophical and theological ethics, and his careful attention to Aristotle's arguments helped preserve nuanced moral reasoning within Christian thought. The work demonstrates sophisticated philosophical methodology that continues to inform debates about natural law and virtue.

Who should read this: Serious students of medieval philosophy, moral theologians interested in the foundations of Catholic ethics, and philosophers working in virtue ethics who want to understand how Christian thinkers engaged classical moral philosophy. This is not accessible to casual readers seeking practical spiritual guidance.

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