Despite a title that sounds like a barked order, “You Must Change Your Life” may be one of the most sensitive, nuanced and fulfilling biennale shows in recent memory. And no, this is not just the relief of a smaller, less foot-blistering marathon of a show than usual, though that too is very much part of the curatorial philosophy. The strong selection of artworks in the main exhibition of the 16th Gwangju Biennale is blessedly free of the moralising, clichéd tone that taints so many recent...