Albert Einstein: Doing (page 2)

variant: If you can't explain something to a six-year-old, you really don't understand it yourself.
variant: If you can't explain it simply, you don't understand it well enough.
Frequently attributed to Richard Feynman
Probably based on a similar quote about explaining physics to a "barmaid" by Ernest Rutherford
Page 418 of Einstein: His Life and Times (1972) by Ronald W. Clark says that Louis de Broglie did attribute a similar statement to Einstein:
: To de Broglie, Einstein revealed an instinctive reason for his inability to accept the purely statistical interpretation of wave mechanics. It was a reason which linked him with Rutherford, who used to state that "it should be possible to explain the laws of physics to a barmaid." Einstein, having a final discussion with de Broglie on the platform of the Gare du Nord in Paris, whence they had traveled from Brussels to attend the Fresnel centenary celebrations, said "that all physical theories, their mathematical expressions apart ought to lend themselves to so simple a description 'that even a child could understand them.' "
The de Broglie quote is from his 1962 book New Perspectives in Physics, p. 184 http://books.google.com/books?id=xY45AAAAMAAJ&q=%22mathematical+expression+apart%22#search_anchor.
Cf. this quote from David Hilbert's talk Mathematical Problems given in 1900 before the International Congress of Mathematicians:
: "A mathematical theory is not to be considered complete until you have made it so clear that you can explain it to the first man whom you meet on the street."
Cf. this quote from Kurt Vonnegut's novel Cat's Cradle:
: Dr. Hoenikker used to say that any scientist who couldn't explain to an eight-year-old what he was doing was a charlatan.
Misattributed

Ich glaube an Spinozas Gott, der sich in der gesetzlichen Harmonie des Seienden offenbart, nicht an einen Gott, der sich mit Schicksalen und Handlungen der Menschen abgibt.
24 April 1929 in response to the telegrammed question of New York's Rabbi Herbert S. Goldstein: "Do you believe in God? Stop. Answer paid 50 words." Einstein replied in only 27 (German) words. The New York Times 25 April 1929 http://select.nytimes.com/gst/abstract.html?res=F10B1EFC3E54167A93C7AB178FD85F4D8285F9
Similarly, in a letter to Maurice Solovine, he wrote: "I can understand your aversion to the use of the term 'religion' to describe an emotional and psychological attitude which shows itself most clearly in Spinoza... I have not found a better expression than 'religious' for the trust in the rational nature of reality that is, at least to a certain extent, accessible to human reason."
As quoted in Einstein : Science and Religion http://www.einsteinandreligion.com/spinoza.html by Arnold V. Lesikar
1920s

As quoted in the essay "To Albert Einstein's Seventieth Birthday" by Arnold Sommerfeld, Albert Einstein : Philosopher-Scientist http://www.worldcat.org/title/albert-einstein-philosopher-scientist/oclc/311439 (1949) edited by Paul A. Schilpp (p. 102). The essay, originally published as "Zum Siebzigsten Geburtstag Albert Einsteins" in Deutsche Beiträge (Eine Zweimonatsschrift) http://www.worldcat.org/title/deutsche-beitrage-eine-zweimonatsschrift/oclc/183334232 Vol. III, No 2, 1949, was translated specifically for the book by Schilpp.
1940s
Variant: Since others have explained my theory, I can no longer understand it myself.

Variant: I never teach my pupils, I only attempt to provide the conditions in which they can learn.

Misattributed
Source: This appears to originate in April 2014 with an unsourced entry in picturequotes: http://www.picturequotes.com/striving-quotes


Ref: en.wikiquote.org - Albert Einstein / Misattributed

According to The Quote Verifier (2006) by Ralph Keyes, Einstein never said any such thing. (According to p. 285 of the book's "source notes" Keyes checked New Statesman 16 April 1965, which is commonly cited as the source of this quote. Some other books claim it is from New Statesman 16 April 1955 and at least one has it as 1945, but a Google Books search http://books.google.com/advanced_book_search?num=10&q=einstein+watchmaker+%22new+statesman%22 with the date range restricted to 1900-1995 shows that all the earliest sources give it as 1965. This includes the earliest source located, The Penguin Dictionary of Modern Quotations from 1971, as can be verified by this search http://www.google.com/search?q=%22of+his+making+the+atom+bomb+possible.+quoted+in+new+statesman%2C+16+april+1965%22&btnG=Search+Books&tbm=bks&tbo=1.) Keyes notes that Einstein "did use similar words to make a very different point" when he wrote, in a 1954 letter to the editor at The Reporter magazine, "If I would be a young man again and had to decide how to make my living, I would not try to become a scientist or scholar or teacher. I would rather choose to be a plumber or a peddler in the hope to find that modest degree of independence still available under present circumstances."
Similarly, in Einstein and the Poet by William Hermanns, p. 86 http://books.google.com/books?id=QXCyjj6T5ZUC&lpg=PP1&pg=PA86#v=onepage&q&f=false, Einstein is quoted saying the following in a 1948 interview: "If I should be born again, I will become a cobbler and do my thinking in peace."
Misattributed
Variant: If only I had known, I should have become a watchmaker.

Source: Attributed in posthumous publications, Einstein and the Poet (1983), p. 132
Variant transcription from "Death of a Genius" in Life Magazine: "I cannot accept any concept of God based on the fear of life or the fear of death, or blind faith. I cannot prove to you that there is no personal God, but if I were to speak of him I would be a liar."
Context: About God, I cannot accept any concept based on the authority of the Church. As long as I can remember, I have resented mass indoctrination. I do not believe in the fear of life, in the fear of death, in blind faith. I cannot prove to you that there is no personal God, but if I were to speak of him, I would be a liar. I do not believe in the God of theology who rewards good and punishes evil. My God created laws that take care of that. His universe is not ruled by wishful thinking, but by immutable laws.

Reply to a letter sent to him on 17 July 1953 p. 39
Attributed in posthumous publications, Albert Einstein: The Human Side (1979)

Albert Einstein, as quoted by Virgil Henshaw in Albert Einstein: Philosopher Scientist (1949) edited by Paul A. Schilpp
1940s
Variant: Never do anything against conscience even if the state demands it.

1920s, Viereck interview (1929)

Letter to Central Association of German Citizens of the Jewish Faith, 3 [5] April 1920, as quoted in Alice Calaprice, The Ultimate Quotable Einstein (2010), p. 195; citing Israelitisches Wochenblatt, 42 September 1920, The Collected Papers of Albert Einstein, Vol. 7, Doc. 37, and Vol. 9, Doc 368.<!-- obviously, parts of this can be taken out of context -->
1920s

1950s, On the Generalized Theory of Gravitation (1950)

"What must be an essential feature of any future fundamental physics?" Letter to Max Born (March 1948); published in Albert Einstein-Hedwig und Max Born (1969) "Briefwechsel 1916-55"<!-- p. 223 Nymphenburger, Munich-->, and in Potentiality, Entanglement and Passion-at-a-Distance: Quantum Mechanical Studies for Abner Shimony, Volume Two edited by Robert Cohen, Michael Horn, and John Stachel (1997), p. 121 http://books.google.com/books?id=DsNoIcQemTsC&lpg=PP1&pg=PA121#v=onepage&q&f=false
1940s

Interview with Rabindranath Tagore (14 April 1930), published in The Religion of Man (1930) by Rabindranath Tagore, p. 222, and in The Tagore Reader (1971) edited by Amiya Chakravarty
1930s