“24 Thus we have, in all, five parts {Ten Commandments, Apostles’ Creed, Lord’s Prayer, Baptism and Lord’s Supper} covering the whole of Christian doctrine, which we should constantly teach and require young people to recite word for word. Do not assume that they will learn and retain this teaching from sermons alone. 25 When these parts have been well learned, you may assign them also some Psalms and some hymns, based on these subjects, to supplement and confirm their knowledge. Thus our youth will be led into the Scriptures so they make progress daily.
26 However, it is not enough for them simply to learn and repeat these parts verbatim. The young people should also attend preaching, especially at the time designated for the Catechism, so that they may hear it explained and may learn the meaning of every part. Then they will also be able to repeat what they have heard and give a good, correct answer when they are questioned, and thus the preaching will not be without benefit and fruit. 27 The reason we take such care to preach on the Catechism frequently is to impress it upon our youth, not in a lofty and learned manner but briefly and very simply, so that it may penetrate deeply into their minds and remain fixed in their memories. 28 Now we shall take up the above-mentioned parts one by one and in the plainest possible manner say about them as much as is necessary” (Shorter Preface of Large Catechism -Tappert, p. 364-5).