The idea that Flaubert was in a sense deeply ordinary, only more so, and that this was one of the reasons for his magnificent anger, was put about by the Goncourt brothers, in their diary: it has a certain plausibility. He attempted to conceal his commonness, they thought, be 'truculent paradoxes, depopulating axioms, revolutionary bellowings, a brutal and indeed ill-brought-up way of setting himself against all received and accepted ideas.'"
Andrew Brown, Gustave Flaubert.