The keynote of the treatise _De Ecclesia_[46] is Hus's peculiar doctrine with regard to predestination. He divides all men into two classes, those who are--either conditionally or unconditionally--predestined (_predestinati_) to eternal bliss, and those who are "foreknown" (_presciti_) to damnation. The mass of the _predestinati_ form the true Holy Catholic Church,[47] but the Church as at present constituted includes the _presciti_ as well as the _predestinati_. Of the true Church, Christ is the only Head. As man He is "Head of the Church within it" (_caput intrinsecum_), as God He is "its Head without it" (_caput extrinsecum_). Christ is the true Roman Pontiff, the High Priest, and the Bishop of Souls. The Apostles did not call themselves "Holy Father" or "Head of the Church," but servant of God and servant of the Church. A change came with the "donation of Constantine" (that singular fiction which played so large a part in the theological controversies of the Middle Ages). Since that time the Pope has considered himself as head (_capitaneus_) of the Church and Christ's vicar upon earth. It is, however, according to Hus, not certain that the Pope is Christ's successor in this world. He is then only Christ's representative and the successor of St. Peter, and the cardinals are only then the successors of the Apostles when they follow the examples of faith, modesty, and love which the former gave. Many Popes and cardinals have not done this, and, indeed, many saintly men who never were Popes were truer successors of the Apostles than, for instance, the present Pope (John XXIII.). St. Augustine did more for the welfare of the Church than many Popes, and studied its doctrines more profoundly than any cardinal from the first to the last. If Pope and cardinals give their attention to worldly affairs, if they scandalise the faithful by their ambition and avarice, then they are successors not of Christ, not of Peter, not of the Apostles, but of Satan, of Antichrist, of Judas Iscariot. Returning to his former point, it is not certain, Hus continues, that the Pope is really the head of the Church; he cannot even be sure that he is not _prescitus_; and therefore no member of the true Church at all. St. Peter erred even after he had been called by Christ. Pope Leo was a heretic, and Pope Gregory was but recently condemned by the Council of Pisa. It is a popular fallacy to imagine that a Pope is necessary to rule the Church. We must be thankful to God that He gave us His only Son to rule over the Church, and He would be able to direct it even if there were no temporal Pope, or if a woman occupied the papal throne.[48] As with the Pope and the cardinals, so with the prelates and the clergy generally. There is a double clergy, that of Christ and that of Antichrist. The former live according to the law of God, the latter seek only worldly advantage. Not every priest is a saint, but every saint is a priest.