“To publish besides the results the way (and the order!) in which they were reached, to mention the blind alleys as well, to mention whether the solution was found in three months or twenty minutes, to express the author's personal feelings (of hope, despair, or fascination), all this is regarded as "unscientific", and, therefore, "bad style". (Just try to include such remarks in your publication: if the referees don't object to them, the editor will!) This taboo seems to extend itself over the teaching of mathematics as well”