And to the true unity of the Church it is enough to agree concerning the doctrine of the Gospel and the administration of the Sacraments. Nor is it necessary that human traditions, that is, rites or ceremonies, instituted by men, should be everywhere alike. As Paul says: One faith, one Baptism, one God and Father of all, etc. Eph. 4, 5. 6.
Article VIII: What the Church Is.
Although the Church properly is the congregation of saints and true believers, nevertheless, since in this life many hypocrites and evil persons are mingled therewith, it is lawful to use Sacraments administered by evil men, according to the saying of Christ: The Scribes and the Pharisees sit in Moses' seat, etc. Matt. 23, 2. Both the Sacraments and Word are effectual by reason of the institution and commandment of Christ, notwithstanding they be administered by evil men.
They condemn the Donatists, and such like, who denied it to be lawful to use the ministry of evil men in the Church, and who thought the ministry of evil men to be unprofitable and of none effect.
Article IX: Of Baptism.
Of Baptism they teach that it is necessary to salvation, and that through Baptism is offered the grace of God, and that children are to be baptized who, being offered to God through Baptism are received into God's grace.
They condemn the Anabaptists, who reject the baptism of children, and say that children are saved without Baptism.