Albert Einstein: Use (page 3)

Albert Einstein was German-born physicist and founder of the theory of relativity. Explore interesting quotes on use.
Albert Einstein: 1404   quotes 289   likes

“Whether you can observe a thing or not depends on the theory which you use. It is the theory which decides what can be observed.”

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

“Nature shows us only the tail of the lion. But there is no doubt in my mind that the lion belongs with it even if he cannot reveal himself to the eye all at once because of his huge dimension. We see him only the way a louse sitting upon him would.”

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.

“On quantum theory I use up more brain grease (rough translation of German idiom) than on relativity.”

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

“Dear Habicht, / Such a solemn air of silence has descended between us that I almost feel as if I am committing a sacrilege when I break it now with some inconsequential babble… / What are you up to, you frozen whale, you smoked, dried, canned piece of soul…?”

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

“To think with fear of the end of one's life is pretty general with human beings. It is one of the means nature uses to conserve the life of the species. Approached rationally that fear is the most unjustified of all fears, for there is no risk of any accidents to one who is dead or not yet born. In short, the fear is stupid but it cannot be helped.”

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