Critical thinking Quote by Carl Sagan
![“To make a contented slave,’ [Frederick] Bailey later wrote, ‘it is necessary to make a thoughtless one. It is necessary to darken his moral and mental vision, and, as far as possible, to annihilate the power of reason.’ This is why the slaveholders must control what slaves hear and see and think…” quote by Carl Sagan](https://sms4smile.com/quotes/img-quotes/9e0/carl-sagan-160_critical-thinking_to-make-a-contented-slave-frederick-bail_1690816.jpg)
““To make a contented slave,’ [Frederick] Bailey later wrote, ‘it is necessary to make a thoughtless one. It is necessary to darken his moral and mental vision, and, as far as possible, to annihilate the power of reason.’ This is why the slaveholders must control what slaves hear and see and think. This is why reading and critical thinking are dangerous, indeed subversive, in an unjust society.””
About This Quote
Source Essay: The Demon‑Haunted World (1995) by Carl Sagan
Sagan warns that enslaving minds through ignorance and propaganda destroys reason, making critical thought dangerous for oppressive regimes.
In simple terms: Oppression thrives when people stop thinking critically.
Key Takeaway
Protect free thought and education.
Themes
censorship
propaganda
critical thinking
freedom
education
Mood
inspirational
cautionary
thought‑provoking
Type
essay
philosophical
When to use this quote
- schools
- media
- political activism
- community organizing
Key Concepts
authoritarianism
psychology of control
intellectual liberty
Questions to Reflect On
- What habits keep your mind critical?
- How can you support free information?
A Different Perspective
Even educated societies can slip into complacency without vigilance.
![“[ When a religious couple wrote to Sagan about fulfilled prophecies, he wrote back in May 1996 :] If ‘fulfilled prophecy’ is your criterion, why do you not believe in materialistic science, which has an unparalleled record of fulfilled prophecy? Consider, for example, eclipses.” quote by Carl Sagan](https://sms4smile.com/quotes/img-quotes/875/carl-sagan-160_belief_when-a-religious-couple-wrote-to-sagan-a_25095.jpg)
![“Simply disabling specific critical thinking skills is all that is necessary for the god virus [to take control of a person].” quote by Darrel Ray](https://sms4smile.com/quotes/img-quotes/b75/darrel-ray-22623_critical_simply-disabling-specific-critical-think_30410.jpg)
