When asked the question, “Why a ‘Jewish’ University?” when Einstein was assisting Chaim Weizmann in fundraising for The Hebrew University of Jerusalem.
As quoted in [Albert Einstein, Letter “Einstein in Singapore.” Manchester Guardian, October 12, 1929]
1920s
Albert Einstein: Frases em inglês (página 30)
Frases em inglês.Fonte: Attributed in posthumous publications, Einstein and the Poet (1983), p. 94
Fonte: Attributed in posthumous publications, Einstein and the Poet (1983), p. 108
Letter to the Michelson Commemorative Meeting of the Cleveland Physics Society (1952), as quoted by R.S.Shankland, Am J Phys 32, 16 (1964), p35, republished in A P French, Special Relativity, ISBN 0177710756
1950s
Gutkind Letter (3 January 1954), [Childish superstition: Einstein's letter makes view of religion relatively clear, The Guardian, 13 May 2008, http://www.guardian.co.uk/science/2008/may/12/peopleinscience.religion]
1950s
Fonte: Attributed in posthumous publications, Einstein and the Poet (1983), p. 139
1940s, The World As I See It (1949)
Variant transcription from "Death of a Genius" in Life Magazine: "Certainly there are things worth believing. I believe in the brotherhood of man and the uniqueness of the individual. But if you ask me to prove what I believe, I can't. You know them to be true but you could spend a whole lifetime without being able to prove them. The mind can proceed only so far upon what it knows and can prove. There comes a point where the mind takes a leap—call it intuition or what you will—and comes out upon a higher plane of knowledge, but can never prove how it got there. All great discoveries have involved such a leap."
Unsourced variant: "The intellect has little to do on the road to discovery. There comes a leap in consciousness, call it intuition or what you will, and the solution comes to you and you do not know how or why. All great discoveries are made in this way." The earliest published version of this variant appears to be The Human Side of Scientists by Ralph Edward Oesper (1975), p. 58 http://books.google.com/books?id=-J0cAQAAIAAJ&q=%22solution+comes+to+you+and+you+do+not+know%22&dq=%22solution+comes+to+you+and+you+do+not+know%22&hl=en, but no source is provided, and the similarity to the "Life Magazine" quote above suggests it's likely a misquote.
Fonte: Attributed in posthumous publications, Einstein and the Poet (1983), p. 136
Fonte: Attributed in posthumous publications, Einstein and the Poet (1983), p. 10
Found anonymously in newspaper columns from the early 1920s http://quoteinvestigator.com/2015/12/31/kiss. Originally presented in dialogue format https://www.newspapers.com/clip/5219841/safety_first/: "Dorcas—”Do you ever allow a man to kiss you when you’re out motoring with him? Philippa—"Never, if a man can drive safely while kissing me he’s not giving the kiss the attention it deserves."
It does not seem to have been attributed to Einstein until the 1990s (e.g. here https://groups.google.com/forum/message/raw?msg=alt.freemasonry/YILn0A-U_WM/f1Grm2akU-4J).
Misattributed
Attributed without source to Einstein in Mieczyslaw Taube, Evolution of Matter and Energy on a Cosmic and Planetary Scale (1985), page 1
Disputed
Variante: 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
Fonte: 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.
Fonte: Attributed in posthumous publications, Einstein's God (1997), p. 98
"Only Then Shall We Find Courage", New York Times Magazine (23 June 1946).
1940s
In response to not knowing the speed of sound as included in the Edison Test: New York Times (18 May 1921); Einstein: His Life and Times (1947) Philipp Frank, p. 185; Einstein, A Life (1996) by Denis Brian, p. 129; "Einstein Due Today" (February 2005) edited by József Illy, Manuscript 25-32 of the Einstein Paper Project; all previous sources as per Einstein His Life and Universe (2007) by Walter Isaacson, p. 299
Unsourced variants: "I never commit to memory anything that can easily be looked up in a book" and "Never memorize what you can look up in books." (The second version is found in "Recording the Experience" (10 June 2004) at The Library of Congress http://www.loc.gov/exhibits/world/world-record.html, but no citation to Einstein's writings is given).
1920s
In response to statement "You once told me that progress is made only by intuition, and not by the accumulation of knowledge."
Variant transcription from "Death of a Genius" in Life Magazine: "It is not quite so simple. Knowledge is necessary too. A child with great intuition could not grow up to become something worthwhile in life without some knowledge. However there comes a point in everyone's life where only intuition can make the leap ahead, without knowing precisely how.":
Fonte: Attributed in posthumous publications, Einstein and the Poet (1983), p. 137
Letter to Dr. H. L. Gordon (May 3, 1949 - AEA 58-217) as quoted in Einstein: His Life and Universe (2007) by Walter Isaacson ISBN 9780743264730
1940s
1940s, Religion and Science: Irreconcilable? (1948)
Unser ganzer gepriesener Fortschritt der Technik, überhaupt die Civilisation, ist der Axt in der Hand des pathologischen Verbrechers vergleichbar.
Letter to Heinrich Zangger (1917), as quoted in A Sense of the Mysterious: Science and the Human Spirit by Alan Lightman (2005), p. 110 http://books.google.com/books?id=-yo_gVxMs6MC&lpg=PP1&pg=PA110#v=onepage&q&f=false, and in Albert Einstein: A Biography by Albrecht Fölsing (1997), p. 399 http://books.google.com/books?id=Kmm0foYfvQAC&q=%22compared+to+an+axe%22#search_anchor
Sometimes paraphrased as "Technological progress is like an axe in the hands of a pathological criminal."
1910s