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Philosophy Quote by Peter Kreeft

“KANT: The traditional religious foundation for morality may be ontologically stronger, but I say it is not logically or epistemologically stronger. It cannot be proved by speculative, theoretical reason. It cannot be known with certainty. I wanted to construct an absolute and certain ethics…” quote by Peter Kreeft
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““KANT: The traditional religious foundation for morality may be ontologically stronger, but I say it is not logically or epistemologically stronger. It cannot be proved by speculative, theoretical reason. It cannot be known with certainty. I wanted to construct an absolute and certain ethics; that’s why I confined myself to the parameters of reason alone—and of practical reason alone, for I believe that practical reason can do much more than theoretical reason. I cut down the bushes and weeds of theoretical reason to make room for the garden of practical faith. SOCRATES: So both your structure and your strategy depend on your epistemology of theoretical reason. Your ethics depends on your epistemology. KANT: Yes. We have already established that. SOCRATES: Then I fear it is a beautiful building with a questionable foundation. KANT: That is your final judgment on my work? SOCRATES: Alas, it is. KANT: I have two questions I would like to ask you in conclusion, if they are allowed. SOCRATES: We do not forbid questions here. KANT: You have told me what you think of my philosophy. Can you assure me that God agrees with your judgment on my philosophy? And can you tell me His judgment on me? On how I am known to God? Can you tell me my Heavenly identity? SOCRATES: Can I do these two things? I can answer both of those questions with the same answer. KANT: And the answer is . . . ? SOCRATES: I. Kant.””

Peter Kreeft

About This Quote

Source Play: Dialogue between Kant and Socrates, from "Socratic Dialogues on Philosophy", 1995

Kant argues that morality must be based on practical reason rather than theological or speculative foundations, and Socrates challenges the certainty of that basis.

In simple terms: Morality should rely on reason, not faith alone.

Key Takeaway

Use reason to evaluate ethical claims.

Themes

ethics reason faith philosophy epistemology

Mood

thoughtful inquisitive

Type

philosophical dialogue

When to use this quote

  • academic debate
  • teaching ethics
  • personal moral reflection

Key Concepts

practical reason theoretical reason foundations of morality

Questions to Reflect On

  • Can moral systems be truly certain without divine authority?
  • How does practical reason address moral dilemmas?
A Different Perspective

Reliance on practical reason may still be limited by human bias.

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