"Science and Religion" (1939-1941), p. 22 http://books.google.com/books?id=Q1UxYzuI2oQC&lpg=PP1&pg=PA22#v=onepage&q&f=false
1950s, Out of My Later Years (1950)
Albert Einstein: Use (page 3)
Albert Einstein was German-born physicist and founder of the theory of relativity. Explore interesting quotes on use.
From a letter by Albert Einstein to Professor Chaim Tchernowitz (31 December 1930) of the Jewish Institute of Religion in New York (Hebrew Union College). Jewish Telegraphic Agency (Jewish Daily Bulletin)
1930s
Objecting to the placing of observables at the heart of the new quantum mechanics, during Heisenberg's 1926 lecture at Berlin; related by Heisenberg, quoted in Unification of Fundamental Forces (1990) by Abdus Salam ISBN 0521371406
1920s
1950s, On the Generalized Theory of Gravitation (1950)
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.
Quoted by Otto Stern, a colleague of Einstein in Zurich from 1912 to 1914, in a 1962 oral history interview http://www.aip.org/history/ohilist/4904.html with Thomas S. Kuhn
Attributed in posthumous publications
Lieber Habicht! / Es herrscht ein weihevolles Stillschweigen zwischen uns, so daß es mir fast wie eine sündige Entweihung vorkommt, wenn ich es jetzt durch ein wenig bedeutsames Gepappel unterbreche... / Was machen Sie denn, Sie eingefrorener Walfisch, Sie getrocknetes, eingebüchstes Stück Seele...?
Opening of a letter to his friend Conrad Habicht in which he describes his four revolutionary Annus Mirabilis papers (18 or 25 May 1905) Doc. 27 http://einsteinpapers.press.princeton.edu/vol5-doc/81?ajax
1900s
Letter to Eileen Danniheisser (1953), quoted in Albert Einstein: Creator and Rebel by Banesh Hoffman (1973), p. 261 http://books.google.com/books?id=sdDaAAAAMAAJ&q=%22think+with+fear%22#search_anchor. The exact date, or the name of his correspondent, is not given in the snippet of the book available online, but the quote appears after the letter to the Queen of Belgium from 12 January 1953, and is prefaced by "Nine months later, in words that recall the beliefs of an early atomic speculator, the Roman poet Lucretius, Einstein had written to an inquirer", followed by the quote. The name "Eileen Danniheisser" is given in Time: Volume 144, where it is mentioned in the snippets here http://books.google.com/books?id=JDAnAQAAIAAJ&q=%22obsessive+thoughts%22#search_anchor and here http://books.google.com/books?id=JDAnAQAAIAAJ&q=%22think+with+fear%22#search_anchor that she had written Einstein "about her obsessive thoughts of death as a child".
1950s
Letter to Queen Mother Elizabeth of Belgium (20 March, likely 1936), written to her when she was depressed over the recent death of her husband and daughter-in-law, p. 51
Attributed in posthumous publications, Albert Einstein: The Human Side (1979)
Source: Attributed in posthumous publications, Einstein and the Poet (1983), p. 26
Source: Attributed in posthumous publications, Einstein and the Poet (1983), p. 16
Source: Attributed in posthumous publications, Albert Einstein: The Human Side (1979), p. 66 of the 1981 edition
1920s, Viereck interview (1929)
1940s, "Autobiographical Notes" (1949)
debunked in 2014
Misattributed
1940s, Why Socialism? (1949)
1940s, Why Socialism? (1949)
1920s, Viereck interview (1929)