Birgitta was the greatest political-poetic genius of the mediæval North. Her revelations fill eight volumes. She wrote them in Swedish, and had a priest translate them into Latin. Some of her original Swedish work is preserved. Birgitta appears to have thought in artistic images, and these images are of plastic form, often of consummate beauty, sometimes witty, sometimes avowedly comic, always effective. The melancholy charm of Sweden’s nature suffuses all her writings and renders to her peculiar mediæval mysticism a national temperament. From Swedish sceneries and animal life she borrows her most beautiful images.
St. Birgitta has by some been considered as a reformer before Luther, but not quite correctly. Luther reformed the institutions; Birgitta aimed at reforming their upholders, and used against the pope and the priests a language almost as strong as Luther’s. Some of her ideas were not strictly in harmony with the Catholic dogmas; she insisted on a close personal union with God, without the mediation of priests or saints, fought for a universal knowledge of the Bible and the preaching of the Gospel in the popular vernaculars, and considered the sale of indulgences a mortal sin. Four hundred and seventy convents of her order, in which men and women were to collaborate for the instruction and spiritual guidance of the people, were after her death founded in the Scandinavian countries, Germany, Esthonia, Poland, Italy and the Netherlands, one existing in England up to the time of Elizabeth. The mother institution at Vadstena, in East Gothland, was of the greatest importance to the cultural development of Sweden and the North. One of the greatest libraries of the Middle Ages was reared, and the first book-printing establishment of Sweden founded there in 1490. Within its walls a considerable literary activity prevailed, the religious literature of the time being copied, or translated into Swedish, and many original works written. The Swedish language, used by the Birgittine school of writers, tried, by approaching Danish forms, to establish a common literary language in the North, the Norwegian having approached the Swedish during the time of the close relations between the courts of the two countries. These efforts, for a time furthered by political relations, were unfortunately soon to be abandoned forever.