Variant: Nature shows us only the tail of the lion. But I do not doubt that the lion belongs to it even though he cannot at once reveal himself because of his enormous size.
As quoted by Abraham Pais in Subtle is the Lord:The Science and Life of Albert Einstein (1982), p. 235 ISBN 0-192-80672-6
Source: Letter to Heinrich Zangger (10 March 1914), quoted in The Curious History of Relativity by Jean Eisenstaedt (2006), p. 126 http://books.google.com/books?id=d2bnXTOtCD8C&lpg=PP1&pg=PA126#v=onepage&q&f=false.
“He asks from men all that he has in himself, though even lions would not claim to match that.”
From the poem "To Sayf Al-Dawla" http://web.archive.org/web/20140708175325/http://www.princeton.edu/~arabic/poetry/al_mu_to_sayf.html
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Al-Mutanabbi 13
Arabic poet from the Abbasid era 915–965Related quotes
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Source: Outsiders: Studies in the Sociology of Deviance (1963), p. 31.