“Criticism, like so many other things, keeps to what has been said before and does not get out of the rut. This business of the 'Beautiful' some see it in curved lines, some in straight lines, but all persist in seeing it as a matter of line. I am now looking out of my window and I can see the most lovely countryside; lines just do not come into my head: the lark is singing, the river sparkles with a thousand diamonds, the leaves are whispering; where, I should like to know, are the lines that produce delicious impressions like these? They refuse to see proportion or harmony except between two lines: all else they regard as chaos, and the dividers alone are judge.”
            Quote from a letter to Léon Peisse, 15 July 1949; as cited in Letters of the great artists – from Blake to Pollock, Richard Friedenthal, Thames and Hudson, London, 1963, p. 68 
this quote refers to Delacroix's refusal to use the line as boundary of the form in his painting art, as a too sharp dividing force in the picture - in contrast to the famous classical painter in Paris then, Ingres 
1831 - 1863
        
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Eugène Delacroix 50
French painter 1798–1863Related quotes
                                        
                                        quote about the growing controversy between Mondrian and Van Doesburg. concerning the use of diagonal lines 
Source: quote from a letter of Mondrian to Theo van Doesburg, undated, c. May 1918; as cited in Mondrian, -The Art of Destruction, Carel Blotkamp, Reaktion Books LTD. London 2001, p. 120
                                    
                                        
                                        "Boscovich's mathematics", an article by J. F. Scott, in the book Roger Joseph Boscovich (1961) edited by Lancelot Law Whyte. 
"Transient pressure analysis in composite reservoirs" (1982) by Raymond W. K. Tang and William E. Brigham. 
"Non-Newtonian Calculus" (1972) by Michael Grossman and Robert Katz.
                                    
                                        
                                        Book II, Chapter 1, "The Rival Conceptions of God" 
Mere Christianity (1952) 
Context: My argument against God was that the universe seemed so cruel and unjust. But how had I got this idea of just and unjust? A man does not call a line crooked unless he has some idea of a straight line. What was I comparing this universe with when I called it unjust?
                                    
                                
                                    “Somedays the line I walk turns out to be straight -
Other days the line tends to deviate.”
                                
                                
                                
                                
                            
                                        
                                        In or Out 
Song lyrics
                                    
                                        
                                        The Onion A.V. Club, November 10, 1999  http://www.avclub.com/articles/george-carlin,13629/ 
Interviews, Print Interviews
                                    
                                        
                                        Goya, in a recall of an overheard conversation 
conversation of c. 1808, in the earliest biography of Goya: Goya, by Laurent Matheron, Schulz et Thuillié, Paris 1858; as quoted by Robert Hughes, in: Goya. Borzoi Book - Alfred Knopf, New York, 2003, p. 176 
probably not accurate word for word, but according to Robert Hughes it rings true in all essentials, of the old Goya, in exile 
1800s
                                    
Ailene Voisin (February 3, 1998) "Bird on the Bench - Larry the Legend Comes Home, Wins Accolades as Coach", The Sacramento Bee, p. D1.