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Certainty Quote by Leonardo da Vinci

“We must doubt the certainty of everything which passes through the senses, but how much more ought we to doubt things contrary to the senses, such as the existence of God and the soul.” quote by Leonardo da Vinci
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“We must doubt the certainty of everything which passes through the senses, but how much more ought we to doubt things contrary to the senses, such as the existence of God and the soul.”

Leonardo da Vinci

About This Quote

Source Letter: Personal correspondence, c. 1500

Sensory experiences are unreliable; we should doubt both sensory data and metaphysical claims like God or soul.

In simple terms: Question all knowledge, even beyond the senses.

Key Takeaway

Cultivate critical inquiry.

Themes

skepticism philosophy epistemology

Mood

analytical curious

Type

philosophical skeptical

When to use this quote

  • scientific research
  • ethical debates
  • personal belief systems
  • education curricula

Key Concepts

Rationalism metaphysics cognitive bias

Questions to Reflect On

  • What evidence justifies belief beyond the senses?
  • How do we balance doubt with faith?
A Different Perspective

Doubt can lead to paralysis.

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