One of these is Luther’s “Unterricht auff etlich Artikell,” dating from the end of Feb., 1519, i.e. from a time when he had already discovered the Roman Antichrist;[1150] the other, his “_Oblatio sive Protestatio_,” dating from the summer of 1520, is a tract unmistakably intended to forestall the publication of the Roman Bull.[1151] In the first work, composed at the instance of Miltitz, it is true he says in praise of the Roman Church that, in her, “St. Peter and St. Paul, 46 Popes and many hundred thousand martyrs had shed their blood,” that she was honoured by God above all others, and that, for the sake of Christian charity and unity, it was not lawful to separate from her for all her present blemishes; he will not, however, express himself regarding the “authority and supremacy of the Roman Church,” “seeing that this does not concern the salvation of souls”; Christ, on the contrary, had founded His Church on charity, meekness and oneness, and, for the sake of this oneness, the Papal commands ought to be obeyed. By this he fancies that he has proved that he “does not wish to detract from the Roman Church.”[1152] What he says in the other writing referred to above is even less acceptable, though here too he wishes to appear “as a submissive and obedient son of the Holy Christian Churches.”[1153] The circumstance that many shortsighted persons doubtless took him at his word at this critical time of his excommunication must have served powerfully to promote the apostasy. As to the changes to which Luther’s mode of thought was liable, we may perhaps be permitted to make a general observation before passing from the consideration of the invisible Church to that of the Church visible. The charge brought against him of having formerly taught differently on many points from what he did at a later date, Luther lightly swept aside with the assurance that he had gone on gradually advancing in the knowledge of the truth. His defenders seek to escape the difficulty in a like way. His changeableness and inconstancy must undoubtedly weigh heavily in the balance. We must not, however, be unfair to him or argue that the fact of his having at first defended elements of Catholic doctrine which he afterwards abandoned constituted a grave self-contradiction. Luther openly admits that it was only gradually that he came to attack the Church so bitterly.