OF THE THOUSANDS OF STORIES THAT VINCENT VAN GOGH CONSUMED in a lifetime of voracious reading, one stood out in his imagination: Hans Christian Andersen’s “The Story of a Mother.” Whenever he found himself with children, he told and retold Andersen’s dark tale of a loving mother who chooses to let her child die rather than expose him to the risk of an unhappy life. Vincent knew the story by heart and could tell it in several languages, including a heavily accented English. For him, whose own life was filled with unhappiness, and who forever sought himself in literature and art, Andersen’s tale of maternal love gone awry possessed a unique power, and his obsessive retellings protested both a unique longing and a unique injury