It must withal be understood, that confession is not enough, but that sorrow of heart must also be evinced by good works; that the old man with his evil works, must first be put off, and that it must be done out of pure faith, as Philip said to the eunuch: “If thou believest with all thine heart, thou mayest.” Acts 8:37. For all outward action, without renewing of the spirit, cannot please God. And the Supper we keep in remembrance of the Lord’s bitter death and sufferings, as is declared [a letter] to the Corinthians: “I have received of the Lord that which also I delivered unto you, That the Lord Jesus, the same night in which he was betrayed, took bread: and when he had given thanks, he brake it, and said, Take, eat; this is my body, which is broken for you: this do in remembrance of me. After the same manner also he took the cup, when he had supped, saying, This cup is the new testament in my blood: this do ye, as oft as ye drink it, in remembrance of me. For as often as ye eat this bread, and drink this cup, ye do shew the Lord’s death till he come.” 1 Cor. 11:23–26. Now if we are to show his death till he come, he is not daily in their mass, nor in all their idolatry, nor in their idol, with which they visit the sick in their distress, where they say he is; this is far from the truth.
And as regards the incarnation of our Lord Jesus Christ, we believe what the holy Scriptures declare concerning it, and are satisfied with the confession of Peter, when Christ asked his disciples, who men said that he was: Some said Jeremiah, Elias, or one of the prophets. Hence Christ asked his disciples: But whom say ye that I am? Peter answered: Lord, thou art the Son of the living God. Matthew 16:13. And as also Nathaniel testifies: Thou art the King of Israel. John 1:49. Paul says: For if, when we were enemies, we were reconciled to God by the death of his Son; much more, being reconciled, we shall be saved by his life. Rom. 5:10. And John says: The blood of Jesus Christ his Son cleanseth us from all sin. 1 John 1:7. And in the Acts of the Apostles it is written: God raised up his child Jesus. Acts 3:26. Now if he raised up his child, it must certainly have been dead. And in Isaiah it is written: A virgin shall receive [conceive], and bear a son. Is. 7:14. If she received [conceived] him, it is my belief that she did not receive more than she brought forth; and I am satisfied with the work of God, however it may have been effected. That I should believe, that he is of her flesh and blood, of this I have no testimony in the holy Scriptures, and am content with the aforesaid confession.
We further practice, according to the doctrine of Christ and of the apostles, an excommunication, whereby the disorderly, who pervert their faith in improper works must be punished, as Christ and Paul declare. It must be used with those that have entered into the communion of the saints and been baptized into one body with them, but relapse into any carnal works, as in adultery, whoredom, murder, drunkenness, idolatry, and the like. Matthew 16:19; 1 Cor. 5:11; 1 Tim. 5:20.
Hence, my child, when you attain to your understanding, defer not to take up the cross, as much as you value your soul, for it is written: “If any man come to me, and hate not his father, and mother, and wife, and children, and brethren, and sisters, yea, and his own life also, he cannot be my disciple. And whosoever doth not bear his cross, and come after me, cannot be my disciple. Luke 14:26,27. Hence everything must be forsaken for the Lord’s sake, for Christ also says in the same chapter: “Whosoever forsaketh not all that he hath cannot be my disciple.” Verse 33.