The Patch of Blue the Prisoner Calls the Sky is Julian Schnabel’s first show in the new Pace Gallery, and he knocks the viewer for a loop. His title derives from Oscar Wilde’s “The Ballad of Reading Gaol” (1898), either a misquotation or a faulty memory of the original. Wilde famously wrote the poem when he was in prison for “gross indecency,” but while he was there, a fellow prisoner was hanged for murdering his wife. In the poem, Wilde slowly identifies himself with the murderer, eventually coining the famous line, “Each man kills the thing he loves.”