In these writings Luther tried to frame his ideas in terms that would be comprehensible not only to the clergy but to people from a wide ranfe of backgrounds. To the Christian Nobility of the German Nation is an attack on the corruption of the church and the abuses of its authority, bringing to light many of the underlying reasons for the Reformation. The second treatise, The Babylonian Captivity of the Church, contains Luther's sharp criticism of the sacramental system of the Catholic church. The Freedom of a Christian gives a concise presentation of Luther's position on the doctrine of justification by faith.