CHAPTER XVII, Of the Catholic and Holy Church of God, and of the One Only Head of the Church

THE CHURCH HAS ALWAYS EXISTED AND IT WILL ALWAYS EXIST. But because God from the beginning would have men to be saved, and to come to the knowledge of the truth (I Tim. 2:4), it is altogether necessary that there always should have been, and should be now, and to the end of the world, a Church.

WHAT IS THE CHURCH? The Church is an assembly of the faithful called or gathered out of the world; a communion, I say, of all saints, namely, of those who truly know and rightly worship and serve the true God in Christ the Savior, by the Word and Holy Spirit, and who by faith are partakers of all benefits which are freely offered through Christ. . . .

ONLY ONE CHURCH FOR ALL TIMES. And since there is always but one God, and there is one mediator between God and men, Jesus the Messiah, and one Shepherd of the whole flock, one Head of this body, and, to conclude, one Spirit, one salvation, one faith, one Testament or covenant, it necessarily follows that there is only one Church. THE CATHOLIC CHURCH. We, therefore, call this Church catholic because it is universal, scattered through all parts of the world, and extended unto all times, and is not limited to any times or places. . . .

THE PARTICULAR CHURCH. Moreover, the Church Militant upon the earth has always had many particular churches. Yet all these are to be referred to the unity of the catholic Church. This [Militant] Church was set up differently before the Law among the patriarchs; otherwise under Moses by the Law; and differently by Christ through the Gospel. . . .

THE CHURCH DOES NOT ERR. It does not err as long as it rests upon the rock Christ, and upon the foundation of the prophets and apostles. And it is no wonder if it errs, as often as it deserts him who alone is the truth. . . .

CHRIST THE SOLE HEAD OF THE CHURCH. It is the head which has the preeminence in the body, and from it the whole body receives life; by its spirit the body is governed in all things; from it, also, the body receives increase, that it may grow up. Also, there is one head of the body, and it is suited to the body. Therefore the Church cannot have any other head besides Christ. For as the Church is a spiritual body, so it must also have a spiritual head in harmony with itself. Neither can it be governed by any other spirit than by the Spirit of Christ. . . .

OF THE NOTES OR SIGNS OF THE TRUE CHURCH. Moreover, as we acknowledge no other head of the Church than Christ, so we do not acknowledge every church to be the true Church which vaunts herself to be such; but we teach that the true Church is that in which the signs or marks of the true Church are to be found, especially the lawful and sincere preaching of the Word of God as it was delivered to us in the books of the prophets and the apostles, which all lead us unto Christ. . . .  

And those who are such in the Church have one faith and one spirit; and therefore they worship but one God, and him alone they worship in spirit and in truth, loving him alone with all their hearts and with all their strength, praying unto him alone through Jesus Christ, the only Mediator and Intercessor; and they do not seek righteousness and life outside Christ and faith in him. Because they acknowledge Christ the only head and foundation of the Church, and, resting on him, daily renew themselves by repentance, and patiently bear the cross laid upon them. Moreover, joined together with all the members of Christ by an unfeigned love, they show that they are Christ's disciples by persevering in the bond of peace and holy unity. At the same time they participate in the sacraments instituted by Christ, and delivered unto us by his apostles, using them in no other way than as they received them from the Lord. . . .

OUTSIDE THE CHURCH OF GOD THERE IS NO SALVATION. But we esteem fellowship with the true Church of Christ so highly that we deny that those can live before God who do not stand in fellowship with the true Church of God, but separate themselves from it. For as there was no salvation outside Noah's ark when the world perished in the flood; so we believe that there is no certain salvation outside Christ, who offers himself to be enjoyed by the elect in the Church; and hence we teach that those who wish to live ought not to be separated from the true Church of Christ. . . .

THE CHURCH APPEARS AT TIMES TO BE EXTINCT. Yes, and it sometimes happens that God in his just judgment allows the truth of his Word, and the catholic faith, and the proper worship of God to be so obscured and overthrown that the Church seems almost extinct, and no more to exist . . .

NOT ALL WHO ARE IN THE CHURCH ARE OF THE CHURCH. Again, not all that are reckoned in the number of the Church are saints, and living and true members of the Church. For there are many hypocrites, who outwardly hear the Word of God, and publicly receive the sacraments, and seem to pray to God through Christ alone, to confess Christ to be their only righteousness, and to worship God, and to exercise the duties of charity, and for a time to endure with patience in misfortune. And yet they are inwardly destitute of true illumination of the Spirit, of faith and sincerity of heart, and of perseverance to the end. But eventually the character of these men, for the most part, will be disclosed. . . . And although while they simulate piety they are not of the Church, yet they are considered to be in the Church, just as traitors in a state are numbered among its citizens before they are discovered; and as the tares or darnel and chaff are found among the wheat, and as swellings and tumors are found in a sound body, when they are rather diseases and deformities than true members of the body. And therefore the Church of God is rightly compared to a net which catches fish of all kinds, and to a field, in which both wheat and tares are found (Matt. 13:24 ff., 47 ff.).

WE MUST NOT JUDGE RASHLY OR PREMATURELY. Hence we must be very careful not to judge before the time, nor undertake to exclude, reject or cut off those whom the Lord does not want to have excluded or rejected, and those whom we cannot eliminate without loss to the Church. On the other hand, we must be vigilant lest while the pious snore the wicked gain ground and do harm to the Church.

THE UNITY OF THE CHURCH IS NOT IN EXTERNALRITES. Furthermore, we diligently teach that care is to be taken wherein the truth and unity of the Church chiefly lies, lest we rashly provoke and foster schisms in the Church. Unity consists not in outward rites and ceremonies, but rather in the truth and unity of the catholic faith. The catholic faith is not given to us by human laws, but by Holy Scriptures, of which the Apostles' Creed is a compendium. . . . So we teach that the true harmony of the Church consists in doctrines and in the true and harmonious preaching of the Gospel of Christ, and in rites that have been expressly delivered by the Lord.

CHAPTER XXVII, Of the Church

1. The catholic or universal church, which is invisible, consists of the whole number of the elect, that have been, are, or shall be gathered into one, under Christ the head thereof; and is the spouse, the body, the fullness of Him that filleth all in all.

2. The visible Church, which is also catholic or universal under the gospel (not confined to one nation as before under the law), consists of all those throughout the world that profess the true religion, together with their children; and is the Kingdom of the Lord Jesus Christ; the house and family of God, through which men are ordinarily saved and union with which is essential to their best growth and service.

3. Unto this catholic visible Church, Christ hath given the ministry, oracles, and ordinances of God, for the gathering and perfecting of the saints, in this life, to the end of the world: and doth by his own presence and Spirit, according to his promise, make them effectual thereunto.

4. This catholic Church hath been sometimes more, sometimes less, visible. And particular churches, which are members thereof, are more or less pure, according as the doctrine of the gospel is taught and embraced, ordinances administered, and public worship performed more or less purely in them.

5. The purest churches under heaven are subject both to mixture and error: and some have so degenerated as to become apparently no churches of Christ. Nevertheless, there shall be always a Church on earth, to worship God according to his will.