The Large Catechism by Dr. Martin Luther is a classic Lutheran studies text by Dr. Martin Luther. A Christian, Profitable, and Necessary Preface and Faithful, Earnest Exhortation of Dr. Martin Luther to All Christians, but Especially to All Pastors and Preachers, that They Should Daily Exercise Themselves in the Catechism, which is a Short Summary and Epitome of the Entire Holy Scriptures, and that they May Always Teach the Same.

A Christian, Profitable, and Necessary Preface and Faithful, Earnest Exhortation of Dr. Martin Luther to All Christians, but Especially to All Pastors and Preachers, that They Should Daily Exercise Themselves in the Catechism, which is a Short Summary and Epitome of the Entire Holy Scriptures, and that they May Always Teach the Same.

We have no slight reasons for treating the Catechism so constantly [in Sermons] and for both desiring and beseeching others to teach it, since we see to our sorrow that many pastors and preachers are very negligent in this, and slight both their office and this teaching; some from great and high art [giving their mind, as they imagine, to much higher matters], but others from sheer laziness and care for their paunches, assuming no other relation to this business than if they were pastors and preachers for their bellies' sake, and had nothing to do but to [spend and] consume their emoluments as long as they live, as they have been accustomed to do under the Papacy.