 
                            
                        
                        
                        
                                        
                                         Speech at a youth rally in Berlin http://der-fuehrer.org/reden/english/34-05-01.htm, 1 May 1934 
1930s
                                    
Quoted in "Japan at the Crossroads" - Page 64 - by Walter Smith - 1936.
                                        
                                         Speech at a youth rally in Berlin http://der-fuehrer.org/reden/english/34-05-01.htm, 1 May 1934 
1930s
                                    
                                        
                                        Quote in the late 1960s, as cited in Asger Jorn (2002) by Arken Museum of Modern Art, p. 28 
1959 - 1973, Various sources
                                    
                                        
                                        About international relationships. Parliamentary speech on November 26, 1940. 
International relationships
                                    
                                        
                                        Letter to Rauscher (8 March 1924), quoted in Jonathan Wright, Gustav Stresemann: Weimar's Greatest Statesman (Oxford University Press, 2004), p. 269 
1920s
                                    
Books, Islam and the West: A Conversation with Bernard Lewis (2006)
                                        
                                        (1741), Ch. I, General Rules for the Improvement of Knowlege, Rule X "Avoid a dogmatical spirit". 
1720s, The Improvement of the Mind (1727)
                                    
Gottlob Frege (1956). "The thought: A logical inquiry" in: Peter Ludlow (1997) Readings in the Philosophy of Language. p. 27
 
                            
                        
                        
                         
                            
                        
                        
                         
                            
                        
                        
                         
                            
                        
                        
                         
                            
                        
                        
                        