“You mustn't think of the Universe as a wilderness. It hasn't been that for billions of years," he said. "Think of it more as….. cultivated.”
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Carl Sagan 365
American astrophysicist, cosmologist, author and science ed… 1934–1996Related quotes
                                        
                                        Maxim 441, trans. Stopp
Variant translation: All intelligent thoughts have already been thought; what is necessary is only to try to think them again. 
Maxims and Reflections (1833)
                                    
Diary Entry (2 March 1916), published in Lamentations of Youth : The Diaries of Gershom Scholem, 1913-1919, p. 109 http://books.google.com/books?id=QSGHABOOFhAC&pg=PA109
                                        
                                        "Quotes of the Day", The Times, 18 February 2005, p. 2. 
2000s, 2005
                                    
Attributed without citation at John Cale Quotes, inspirationalstories.com, 16 November 2012 http://www.inspirationalstories.com/quotes/t/john-cale/,
                                        
                                        19 June 51, p. 34 
Attributed in posthumous publications, Albert Einstein: The Human Side (1979)