Lord God, Father in heaven, Maker of all things, have mercy upon me and hear me!
Lord God the Son, Savior of the world, have mercy upon me and hear me!
Lord God, the Holy Spirit, the Comforter in all trouble, have mercy upon me and hear me and make supplication within me!
The Augsburg Confession
Article VII. Of the Church.
Also they teach that one holy Church is to continue forever. The Church is the congregation of saints, in which the Gospel is rightly taught and the Sacraments are rightly administered.
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.
The Old Testament gets presented to children as a series of "just-so" stories where the good guys win.
The Old Testament is actually a treatise on human nature, the futility of man's attempts to save himself, and ultimately why we are in need of a Savior.