Of this repentance John preaches, and afterwards Christ in the Gospel, and we also. By this [preaching of] repentance we dash to the ground the Pope and everything that is built upon our good works. For all is built upon a rotten and vain foundation, which is called a good work or law, even though no good work is there, but only wicked works, and no one does the Law (as Christ, John 7, 19, says), but all transgress it. Therefore the building [that is raised upon it] is nothing but falsehood and hypocrisy, even [in the part] where it is most holy and beautiful.
And in Christians this repentance continues until death, because, through the entire life it contends with sin remaining in the flesh, as Paul, Rom. 7, 14-25, [shows] testifies that he wars with the law in his members, etc.; and that, not by his own powers, but by the gift of the Holy Ghost that follows the remission of sins. This gift daily cleanses and sweeps out the remaining sins, and works so as to render man truly pure and holy.
The Pope, the theologians, the jurists, and every other man know nothing of this [from their own reason], but it is a doctrine from heaven, revealed through the Gospel, and must suffer to be called heresy by the godless saints [or hypocrites].
On the other hand, if certain sectarists would arise, some of whom are perhaps already extant, and in the time of the insurrection [of the peasants] came to my own view, holding that all those who had once received the Spirit or the forgiveness of sins, or had become believers, even though they should afterwards sin, would still remain in the faith, and such sin would not harm them, and [hence] crying thus: "Do whatever you please; if you believe, it all amounts to nothing; faith blots out all sins," etc.—they say, besides, that if any one sins after he has received faith and the Spirit, he never truly had the Spirit and faith: I have had before me [seen and heard] many such insane men, and I fear that in some such a devil is still remaining [hiding and dwelling].
It is, accordingly, necessary to know and to teach that when holy men, still having and feeling original sin, also daily repenting of and striving with it, happen to fall into manifest sins, as David into adultery, murder, and blasphemy, that then faith and the Holy Ghost has departed from them [they cast out faith and the Holy Ghost]. For the Holy Ghost does not permit sin to have dominion, to gain the upper hand so as to be accomplished, but represses and restrains it so that it must not do what it wishes. But if it does what it wishes, the Holy Ghost and faith are [certainly] not present. For St. John says, 1 Ep. 3, 9: Whosoever is born of God doth not commit sin,... and he cannot sin. And yet it is also the truth when the same St. John says, 1 Ep. 1, 8: If we say that we have no sin, we deceive ourselves and the truth is not in us.
IV. Of the Gospel.
We will now return to the Gospel, which not merely in one way gives us counsel and aid against sin; for God is superabundantly rich [and liberal] in His grace [and goodness]. First, through the spoken Word by which the forgiveness of sins is preached [He commands to be preached] in the whole world; which is the peculiar office of the Gospel. Secondly, through Baptism. Thirdly, through the holy Sacrament of the Altar. Fourthly, through the power of the keys, and also through the mutual conversation and consolation of brethren, Matt. 18, 20: Where two or three are gathered together, etc.
V. Of Baptism.
Baptism is nothing else than the Word of God in the water, commanded by His institution, or, as Paul says, a washing in the Word; as also Augustine says: Let the Word come to the element, and it becomes a Sacrament. And for this reason we do not hold with Thomas and the monastic preachers [or Dominicans] who forget the Word (God's institution) and say that God has imparted to the water a spiritual power, which through the water washes away sin. Nor [do we agree] with Scotus and the Barefooted monks [Minorites or Franciscan monks], who teach that, by the assistance of the divine will, Baptism washes away sins, and that this ablution occurs only through the will of God, and by no means through the Word or water. Of the baptism of children we hold that children ought to be baptized. For they belong to the promised redemption made through Christ, and the Church should administer it [Baptism and the announcement of that promise] to them.
VI. Of the Sacrament of the Altar.