While Luther, in his _German Worship,_ as well as in other places, favors also Latin masses, yet he demands that "for the sake of the unlearned laity" German services be introduced. And since the unlearned could be truly served only by instruction in the fundamental truths of Christianity, the Catechism, according to Luther, was to constitute a chief part in these services. "Very well," says he, "in God's name! First of all a clear, simple plain, good Catechism is needed in the German service. Catechism, however, is an instruction whereby heathen who desire to become Christians are taught and instructed in what they must believe, do, not do, and know concerning Christianity. Pupils who were accepted for such instruction and learned the faith before being baptized were therefore called catechumens. Nor do I know how to present this instruction, or teaching, in a form more simple than it already has been presented since the beginning of Christianity, and hitherto retained, to wit, the three parts: the Ten Commandments, the Creed, and the Lord's Prayer. These three parts contain in simple and brief form everything that a Christian must know. And since as yet we have no special congregation (_weil man noch keine sonderliche Gemeinde hat_), this instruction must proceed in the following manner, by preaching from the pulpit at various times or daily, as necessity demands, and by repeating and reading it to the children and servants at home in the houses morning and evening (if one would make Christians of them). Yet not only so that they memorize the words or recite them, as was done hitherto, but by questioning them part for part, and having them state in their answer what each part means and how they understand it. If all parts cannot be asked at one time, take one, the next day another. For if the parents or guardians are unwilling to take such pains with the young, either personally or through others the Catechism will never be established." (19, 76.) German Catechism in German services--such, then, was the slogan which Luther now sounded forth with ever-increasing emphasis. 92. Luther Illustrating Method of Procedure.