Outside, it was cold and dark. Inside, brightly colored forms seemed to swirl and spread. It was February, 2013, the evening of the opening of "Hilma af Klint-A Pioneer of Abstraction" at Moderna Museet, in Stockholm. Among the attendees was Kurt Almqvist, a white-haired man in his mid-fifties. Though Almqvist considered himself something of an expert on fin-de-siècle intellectual history-he had written a book on Carl Jung-he was seeing af Klint's paintings for the first time.