As already stated, the bibliography of Hus is as yet very uncertain, and it is not easy to fix the exact dates of his works. It may, however, be generally stated that his earliest Bohemian writings were composed in the years from 1406 to 1410, that his most important works in that language date from the last years of his life (1412-1415), and that the period of his exile from Prague was that of his greatest literary activity. The earliest important Bohemian works of Hus are a series of Expositions (_Výklad_) dealing consecutively of Faith, the Ten Commandments, and the Lord's Prayer. Each Exposition is followed by a shorter, more condensed treatise dealing with the same subject as the longer one that precedes. Of these Expositions the first one, dealing of Faith, has most interest. It consists of a continuous comment on the different articles of the Apostle's creed. Hus writes: "We believe that the twelve Apostles, immediately after Christ's ascension to heaven, composed this creed. And as there were then twelve Apostles, besides Paul and Barnabas, who were called after the ascension of Jesus, thus, according to general opinion, each article was expounded by one particular Apostle. But be it known to you, that the learned do not agree as to what particular article each Apostle expounded." Hus then proceeds to attribute to each Apostle the exposition and defence of one of the articles, obviously following the method then usual at the theological disputations at universities in which he so frequently took part. In Chapter XVIII. the defence of the tenth article, which refers to the Holy Catholic Church, is attributed to St. Simon. It is interesting as containing some of the very distinctive ideas of Hus. He writes: "Every Christian must believe in the Holy Catholic Church. The reason is, that every Christian must love Christ, who is the husband of that Church, and that Church is Christ's spouse.... And as no one will honour his mother if he has no knowledge of her, therefore it is very necessary to know the Holy Church through faith, for ignorance of the Church causes many errors among the people. Therefore be it known to you that the first Bohemian who translated the Greek word _ecclesia_ misunderstood that word; therefore he foolishly rendered it by the word 'church' or 'chapel,' as if he believed that the bride of Christ was a church made of stone or a chapel made of wood. But had he translated the word _ecclesia_ by 'congregation,' then so many would not have erred. Others, again, err, saying that the Pope is the Holy Church; others, that it is the Cardinals with the Pope; while others, again, say all priests together, and yet others (say) all Christians together, constitute the Church.