„To know that we know what we know, and that we do not know what we do not know, that is true knowledge.“

—  Confucio, As quoted in Walden (1854) by Henry David Thoreau, Ch. 1
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Nicolaus Copernicus photo

„To know that we know what we know, and that we do not know what we do not know, that is true knowledge.“

—  Nicolaus Copernicus Renaissance mathematician, Polish astronomer, physician 1473 - 1543
Confucius, as quoted in Walden (1854) by Henry David Thoreau, Ch. 1

Federico Buffa photo

„Do you believe in miracles?“

—  Federico Buffa, Riferita ai 13 punti in 35 secondi messi a segno da Tracy McGrady in Rockets-Spurs 9 dicembre 2004]

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Henry David Thoreau photo
Robert N. Proctor photo
P. D. Ouspensky photo

„The most difficult thing is to know what we do know, and what we do not know.“

—  P. D. Ouspensky Russian esotericist 1878 - 1947
Context: The most difficult thing is to know what we do know, and what we do not know. Therefore, desiring to know anything, we shall before all else determine WHAT we accept as given, and WHAT as demanding definition and proof; that is, determine WHAT we know already, and WHAT we wish to know. In relation to the knowledge of the world and of ourselves, the conditions would be ideal could we venture to accept nothing as given, and count all as demanding definition and proof. In other words, it would be best to assume that we know nothing, and make this our point of departure. But unfortunately such conditions are impossible to create. Knowledge must start from some foundation, something must be recognized as known; otherwise we shall be obliged always to define one unknown by means of another. Ch. I

Pierre-Simon Laplace photo

„What we know is not much. What we do not know is immense.“

—  Pierre-Simon Laplace French mathematician and astronomer 1749 - 1827
Allegedly his last words, reported in Joseph Fourier's "Éloge historique de M. le Marquis de Laplace" (1829) with the comment, "This was at least the meaning of his last words, which were articulated with difficulty." Quoted in Augustus De Morgan's Budget of Paradoxes (1866).

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Lupe Fiasco photo
Huston Smith photo

„In mysteries what we know, and our realization of what we do not know, proceed together; the larger the island of knowledge, the longer the shoreline of wonder.“

—  Huston Smith, Beyond the Post-Modern Mind: The Place of Meaning in a Global Civilization
Context: In mysteries what we know, and our realization of what we do not know, proceed together; the larger the island of knowledge, the longer the shoreline of wonder. It is like the quantum world, where the more we understand its formalism, the stranger that world becomes. Part of this quote may actually be by Ralph Washington Sockman.

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Jean-Claude Juncker photo

„We all know what to do, we just don’t know how to get re-elected after we’ve done it.“

—  Jean-Claude Juncker Luxembourgian politician 1954
When talking about economic reforms. http://ec.europa.eu/economy_finance/publications/publication_summary12588_en.htm&ved=0ahUKEwiBxefUmpXRAhVJjywKHZEnBBIQFggaMAA&usg=AFQjCNGP2YiE7cKXtbR9DsI71bR6q0OkGw (page 4 of the report).

Philip Stanhope, 4th Earl of Chesterfield photo
Woody Allen photo

„Is Knowledge knowable? If not, how do we know?“

—  Woody Allen, The Insanity Defense: The Complete Prose

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