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About this quote

What does it mean?
The core of science is avoiding self-deception because humans are naturally biased. You must rigorously test your own ideas to avoid fooling yourself.
In plain terms
Science starts by not lying to yourself since you are your own biggest fool.
What can you take from it?
Question your own assumptions first to find truth.

Where it applies

  • research
  • decision making
  • self improvement

Putting it to work

  • seek disconfirming evidence
  • invite peer critique

Questions to consider

  • What beliefs do I refuse to question?
  • How do I test my own biases?

Another view

External verification is also needed since self-correction has limits.

More from Richard Feynman

  1. I can live with doubt, and uncertainty, and not knowing. I think it's much more interesting to live not knowing than to have answers which might be wrong. I ha…

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  2. Science alone of all the subjects contains within itself the lesson of the danger of belief in the infallibility of the greatest teachers in the preceding gene…

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  3. The fact that you are not sure means that it is possible that there is another way someday.

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