Often, the enjoyment of a work of art requires one to forget about its message and simply focus on its sensory appeal. In other cases, the work of art is the message. The project of cultural diplomacy often straddles this border between agenda and art for art's sake, and at a time when U.S.-Russian relations are publicly frayed, cultural exchange can help to keep tensions at bay. Last week, Grammy Award-winning American saxophonist Bill Evans, a former bandmate of Miles Davis, performed with his band "Soulgrass" at Spaso House, the official residence of the U.S. ambassador.