Contributed by David Carrier / Ernst Gombrich’s The Story of Art opens with a surprising juxtaposition of two drawings. One portrays Rubens’ handsome little son, the other Dürer’s aged mother. Of the latter Gombrich says: “His truthful study of careworn old age may give us a shock which makes us turn away from it – and yet, if we fight against our first repugnance we may be richly rewarded, for Dürer’s drawing in its tremendous sincerity is a great work.” Gombrich was, to be sure, a conceptually conservative art historian. But this declaration is a perfect introduction to the once iconoclastic Joan Semmel’s “In the Flesh,” now on view at the Jewish Museum.