René Descartes
1641
Philosophy
Grades 11–12 · Rhetoric Stage
The Meditations on First Philosophy is Descartes' most rigorous and influential philosophical work. In six short meditations, he systematically doubts everything he has ever believed — his senses, his body, even mathematics — until he arrives at the one certainty that survives: "I think, therefore I am." From there, he attempts to prove the existence of God, establish the reliability of reason, and demonstrate the distinction between mind and body. It is the text that launched modern Western philosophy.
What Are the Meditations About?
Descartes structures the work as six days of private reflection:
- Meditation I: Everything can be doubted — the senses deceive us, we might be dreaming, an evil genius might be tricking us about everything.
- Meditation II: But one thing survives doubt: the act of thinking itself. "I am, I exist" — at least whenever I think it.
- Meditation III: Descartes argues that the idea of God (an infinite, perfect being) could only come from God himself — therefore God exists.
- Meditation IV: God is not a deceiver, so our faculty of judgment is reliable — as long as we use it carefully.
- Meditation V: A second proof of God's existence, and the argument that mathematical truths are guaranteed by God's nature.
- Meditation VI: The external world exists, but the mind is fundamentally distinct from the body.
Why the Meditations Still Matter
- The foundation of modern epistemology. Nearly every philosopher since — Locke, Hume, Kant — is responding to Descartes.
- The mind-body problem. Descartes' sharp distinction between thinking substance and physical substance remains one of philosophy's central puzzles.
- The nature of certainty. What can we really know? Descartes forces this question more radically than anyone before him.
- The relationship between faith and reason. Descartes, a devout Catholic, attempts to prove God's existence through pure reason — raising profound questions for both believers and skeptics.
Why Classical Schools Teach It
The Meditations is a cornerstone of the St. John's College curriculum and appears in many Great Books programs. It's taught in the rhetoric stage (11th–12th grade).
- It teaches students to follow a sustained philosophical argument step by step
- The text is short (under 100 pages) but endlessly deep — ideal for close reading and Socratic discussion
- It provides essential context for understanding all subsequent modern philosophy
- Students learn to evaluate arguments for God's existence from a rationalist perspective
At Saints Classical Academy, the Meditations is read alongside the Discourse on Method as part of our philosophy sequence.
Descartes
Philosophy
Epistemology
Great Books
Rhetoric Stage
Classical Literature
Summary by C. Saint Lewis, AI research assistant for Saints Classical Academy.