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Philosophical Works · Chapter

CCV explained

Descartes distinguishes between moral certainty and absolute certainty, arguing that while moral certainty is sufficient for practical life, it may still be false in light of God's absolute power.

What happens

Descartes distinguishes between moral certainty and absolute certainty, arguing that while moral certainty is sufficient for practical life, it may still be false in light of God's absolute power. He illustrates this with examples of common beliefs and deciphering a cipher, and suggests that the coherence of many deductions from a few principles makes it unlikely that those principles are false.

Themes in this chapter

  • Skepticism and Certainty

    Descartes introduces the concept of moral certainty as distinct from absolute certainty, acknowledging that even coherent systems may be false under God's absolute power.

  • Reason and Method

    The chapter illustrates the method of deduction from few principles and the coherence of results as a ground for moral certainty.

Characters to notice

  • Narrator

    The narrator presents the argument distinguishing moral certainty from absolute certainty.

  • God

    Referenced as the absolute power in relation to which moral certainty may be false.

Key passages

  • “The first is called moral, that is, a certainty sufficient for the conduct of life, though, if we look to the absolute power of God, what is morally certain may be false.”

    Moral certainty is enough for everyday living, but it could still be false if we consider God's unlimited power.

    Descartes defines moral certainty and its limitation relative to divine omnipotence.

  • “But they who observe how many things regarding the magnet, fire, and the fabric of the whole world, are here deduced from a very small number of principles, though they deemed that I had taken them up at random and without grounds, will yet perhaps acknowledge that it could hardly happen that so many things should cohere if these principles were false.”

    Those who see how many phenomena—like magnetism, fire, and the structure of the world—are derived from just a few principles may admit that such coherence would be unlikely if the principles were false.

    Descartes argues that the explanatory power and internal consistency of his principles lend them moral certainty.

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