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As quoted by Diogenes Laërtius, vii. 182.
Source: Consciencism (1964), Philosophy In Retrospect, p. 5.
                                        
                                        FM 44 as cited in: Oliver Leaman (2002) An Introduction to Classical Islamic Philosophy, p. 179 
The Decisive Treatise
                                    
                                        
                                        As quoted in The Works of the Emperor Julian (1923) by Wilmer Cave France Wright, p. 39; also in The Missing Jesus: Rabbinic Judaism and the New Testament (2003) by Craig Alan Evans, Carl A. Elliott, Bruce Chilton, Jacob Neusner 
General sources
                                    
Source: Aphorisms and Reflections (1901), p. 180
 
                            
                        
                        
                         
                            
                        
                        
                         
                            
                        
                        
                        