How did St. Thomas Aquinas respond to concerns about Aristotle's philosophy?

St. Thomas Aquinas addressed concerns regarding Aristotle’s philosophy by demonstrating that reason and faith, both originating from a divine source, cannot contradict one another. During his time, many conservative theologians viewed Aristotelianism with suspicion, partly because they believed it threatened traditional Christian doctrines and partly because the works had been distorted by heterodox Arabic commentators.123

Aquinas responded to these challenges through several key approaches:

• Writing Commentaries: He authored his own commentaries on Aristotle’s works to strip away heterodox interpretations—particularly those of Averroës—and to reveal the essential soundness of Aristotle’s system for Christian theology.12
• Distinguishing Domains: In works like the Summa theologiae, he clearly separated the methods of philosophy, which relies on sensory data and natural reason, from theology, which is based on divine revelation.12
• Transformation and Correction: Rather than compromising Christian doctrine, Aquinas adapted Aristotelian concepts—such as the "unmoved mover" or the soul as the form of the body—by modifying them to align with Christian belief. He famously established harmony by deepening philosophical principles, such as his understanding of being (esse) as the act of existing, which distinguishes God from all created things.12

By doing so, Aquinas defended the autonomy of natural reason while maintaining that it serves as a necessary foundation for faith.4