In jurisprudence the Renaissance may be described as the introduction of historical and scientific methods, the abandonment of legal fictions based upon collections of false decretals, the recovery of the true text of the Roman code, and the substitution of civil for canon law as the basis of legislation and government. There was a complete break with the past. The substitution of civil law based upon the lawbooks of Justinian for the canon law founded upon the Decretum of Gratian, involved such a breach in continuity that it was the most momentous of all the changes of that period of transition. For law enters into every human relation, and a thorough change of legal principles must involve a revolution which is none the less real that it works almost silently. The codes of Justinian and of Theodosius completely reversed the teachings of the canonists, and the civilian lawyers learned to look upon the Church as only a department of the State. In literature there was the discovery of classical manuscripts, the introduction of the study of Greek, the perception of the beauties of language in the choice and arrangement of words under the guidance of classical models. The literary powers of modern languages were also discovered,—Italian, English, French, and German,—and with the discovery the national literatures of Europe came into being. In art a complete revolution was effected in architecture, painting, and sculpture by the recovery of ancient models and the study of the principles of their construction. The manufacture of paper, the discovery of the arts of printing and engraving, multiplied the possession of the treasures of the intelligence and of artistic genius, and combined to make art and literature democratic. What was once confined to a favoured few became common property. New thoughts could act on men in masses, and began to move the multitude. The old mediæval barriers were broken down, and men came to see that there was more in religion than the mediæval Church had taught, more in social life than feudalism had manifested, and that knowledge was a manifold unknown to their fathers.