Philip Guston NowA sweeping retrospective of Philip Gustons influential work, from Depression era muralist to abstract expressionist to tragicomic contemporary master Philip Gustonperhaps more than any other figure in recent memoryhas given contemporary artists permission to break the rules and paint what, and how, they want. His winding career, embrace of high and low sources, and constant aesthetic reinvention defy easy categorization, and his 1968 figurative turn