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About this quote

What does it mean?
Humans are uniquely dangerous to themselves, so we must compete with our own flaws to improve.
In plain terms
Man is his own worst enemy and must push himself to grow.
What can you take from it?
Recognize self-sabotage as the primary obstacle to progress.

Where it applies

  • personal development
  • leadership
  • societal reform

Putting it to work

  • challenge personal limits
  • identify internal biases
  • seek constructive criticism

Questions to consider

  • What internal habits hold you back?
  • How can you compete with your own flaws?

Another view

It overlooks external threats that also harm humanity.

More from Robert A. Heinlein

  1. Beware of altruism. It is based on self-deception, the root of all evil.

    Permalink to quote #66
  2. Certainly the game is rigged. Don't let that stop you; if you don't bet, you can't win.

    Permalink to quote #68
  3. Being intelligent is not a felony. But most societies evaluate it as at least a misdemeanor.

    Permalink to quote #65

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