American composer Steven Mackey dedicated his Stumble to Grace—which cleverly mimics five stages in the development of his and Orli Shaham’s respective young children—to this weekend’s pianist, Orli Shaham, an artist of remarkable musicality and flawless technique. St. Louis Symphony Music Director David Robertson completes the all-American program with Bernstein’s dynamic, jazz-influenced dance episodes from On the Town, Barber’s poignant Adagio for Strings and Bernstein’s Age of Anxiety, a masterful rendering for orchestra and piano (played by Orli Shaham) of W.H. Auden’s epic poem about four lonely wartime strangers who spend an evening in a New York bar pondering the human condition.