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  • Courageous Quotes   11
  • Ask courageous questions. Do not be satisfied with superficial answers. Be open to wonder and at the same time subject all claims to knowledge, without exception, to intense skeptical scrutiny. Be aware of human fallibility. Cherish your species and your planet.
  • 3 years ago



    Tags : Carl Sagan Quotes , Answers Quotes , Courageous Quotes