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  • « La connaissance de la loi [de la gravitation] trouve comme seules applications auxquelles je puisse penser la prospection géophysique, la prédiction des marées et aujourd’hui, de façon plus moderne, l’étude des trajectoires des satellites et sondes interplanétaires que nous envoyons là-haut; finalement, et c’est aussi moderne, le calcul des positions des planètes, ce qui est très utile pour les prédictions des horoscopes que les astrologues publient dans les journaux. Etrange monde où nous vivons, qui n’utilise les nouveaux progrès de notre savoir que pour perpétuer des absurdités vieilles de deux mille ans. » - in “La nature de la Physique” (p.30), R. Feynman.
  • "La réalité doit prévaloir sur les relations publiques, car la nature ne peut pas être trompée." - R Feynman
  • La philosophie des sciences est aussi utile aux scientifiques que l'ornithologie aux oiseaux. — Richard Feynman


  • “If a science has an adjective, it probably isn’t a science.” ~ Richard Feynman
  • "I believe in limited government. I believe that government should be limited in many ways, and what I am going to emphasize is only an intellectual thing. I don't want to talk about everything at the same time. Let's take a small piece, an intellectual thing." - R Feynman
  • "I believe, therefore, that although it is not the case today, that there may some day come a time, I should hope, when it will be fully appreciated that the power of government should be limited; that governments ought not to be empowered to decide the validity of scientific theories, that that is a ridiculous thing for them to try to do; that they are not to decide the various descriptions of history or of economic theory or of philosophy. Only in this way can the real possibilities of the future human race be ultimately developed." - Richard P. Feynman
  • I learned very early the difference between knowing the name of something and knowing something. - R Feynman
  • I, therefore, did learn a lesson: The female mind is capable of understanding analytic geometry. Those people who have for years been insisting (in the face of all obvious evidence to the contrary) that the male and female are equally capable of rational thought may have something. The difficulty may just be that we have never yet discovered a way to communicate with the female mind. If it is done in the right way, you may be able to get something out of it. - R. Feynman http://thefrenchexit.blogspot.com/2011/11/richard-feynman-on-female-mind.html
  • "If an apple was magnified to the size of the Earth, then the atoms in the apple would be approximately the size of the original apple." - R Feynman
  • "If that's the world's smartest man, God help us." - Lucille Feynman (Richard Feynman's mother !)
  • "No government has the right to decide on the truth of scientific principles, nor to prescribe in any way the character of the questions investigated. Neither may a government determine the aesthetic value of artistic creations, nor limit the forms of literacy or artistic expression. Nor should it pronounce on the validity of economic, historic, religious, or philosophical doctrines. Instead it has a duty to its citizens to maintain the freedom, to let those citizens contribute to the further adventure and the development of the human race." - R Feynman "The Uncertainty of Values"
  • "... nobody has ever figured out the cause of government stupidity & until they do (and find the cure), all ideal plans will fall into quicksand." - R Feynman
  • “philosophy of science is about as useful to scientists as ornithology is to birds" - R. Feynman
  • "Reality must take precedence over public relations, for nature cannot be fooled." - R Feynman
  • Since then I never pay attention to anything by "experts". I calculate everything myself. - After having been led astray on the neutron-proton coupling constant by reports of "beta-decay experts". Part 5: "The World of One Physicist", "The 7 Percent Solution"
  • "The first principle is that you must not fool yourself, and you are the easiest person to fool." - R Feynman
  • « Theoretically, planning may be good. But nobody has ever figured out the cause of government stupidity — and until they do (and find the cure), all ideal plans will fall into quicksand » — Richard Feynman
  • "There are all kinds of interesting questions that come from a knowledge of science, which only adds to the excitement and mystery and awe of a flower. It only adds. I don't understand how it subtracts." - R Feynman
  • "There's Plenty of Room at the Bottom" - Richard Feynman
  • "To those who do not know mathematics it is difficult to get across a real feeling as to the beauty, the deepest beauty, of nature ... If you want to learn about nature, to appreciate nature, it is necessary to understand the language that she speaks in." - R Feynman, The Character of Physical Law (1965) Ch. 2 (-> "L'univers est écrit en langage mathématique" - Galilée)
  • "Value of science remains unsung by singers, you are reduced to hearing not a song or poem, but an evening lecture about it. This is not yet a scientific age." - R Feynman
  • “We are trying to prove ourselves wrong as quickly as possible, because only in that way can we find progress.” ~ Richard P. Feynman
  • "What I cannot create, I do not understand." On his blackboard at time of death in 1988; as quoted in The Universe in a Nutshell by Stephen Hawking

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