The theoretician believes in logic and believes that he despises dreams, intuition, and poetry. He does not recognize that these three fairies have only disguised themselves in order to dazzle him like a love-sick fifteen-year-old. He does not know that he owes his greatest discoveries to them. They introduced themselves in the guise of "working hypotheses," "arbitrary conditions," and "analogies"; how could he, the theoretician, have guessed that he was deceiving austere logic, and that in listening to them he was listening to the Muses' song...
-From the journal: "Document," August 1, 1939, concerning test pilots, by Antoine de Saint-ExupÉry (author of "The Little Prince")