section_path: Origins/Humanism and lay religion
section_name: Humanism and lay religion
paragraph_text: Humanism and lay religion
  
  A new intellectual movement known as Humanism emerged in the Late Middle Ages. The Humanists' slogan ad fontes ! ('back to the sources!') demonstrated their enthusiasm for Classical texts and textual criticism. The rise of the Ottoman Empire led to the mass immigration of Byzantine scholars to Western Europe, and many of them brought manuscripts previously unknown to western scholarship. This led to the rediscovery of the Ancient Greek philosopher Plato (347/348 BC). Plato's ideas about an ultimate reality lying beyond visible reality posed a serious challenge to scholastic theologians' rigorous definitions. Textual criticism called into question the reliability of some of the fundamental texts of papal privilege: humanist scholars, like Nicholas of Cusa (d. 1464) proved that one of the basic documents of papal authority, the allegedly 4th-century Donation of Constantine was a medieval forgery.
  
  New religious movements promoted the deeper involvement of laity in religious practices. The Brethren of the Common Life dissuaded their members' priestly ordination and often placed their houses under the protection of urban authorities. They were closely associated with the devotio moderna, a new method of Catholic spirituality with a special emphasis on the education of laypeople. A leader of the movement the Dutch Wessel Gansfort (d. 1489) attacked abuses of indulgences.
  
  As the manufacturing of paper from rags and the printing machine with movable type were spreading in Europe, books could be bought at a reasonable price from the 15th century. Demand for religious literature was especially high. The German inventor Johannes Gutenberg (d. 1468) first published a two-volume printed version of the Vulgata in the early 1450s. High and Low German, Italian, Dutch, Spanish, Czech and Catalan translations of the Bible were published between 1466 and 1492; in France, the Bible's abridged French versions gained popularity. Laypeople who read the Bible could challenge their priests' sermons, as it happened already in 1515.
  
  Completed by Jerome (d. 420), the Vulgate contained the Septuagint version of the Old Testament. The systematic study of Biblical manuscripts revealed that Jerome had sometimes misinterpreted his sources of translation. A series of Latin-Greek editions of the New Testament was completed by the Dutch humanist Erasmus (d. 1536). These new Latin translations challenged the scriptural proof texts for some Catholic dogmas.