What the Church of the Lutheran Reformation possessed and what modern Protestantism has lost, what Catholicism before the Reformation had largely forgotten and what modern Catholicism has largely learned to understand again is the simple truth of faith in the real presence of the true body and blood of our Lord Jesus Christ in, with, and under the forms of bread and wine in Holy Communion.

Concerning that truth the congregations of the Lutheran Reformation were “instructed often and with the greatest diligence,” both adults and children. The Sixth Chief Part of the [Small] Catechism was written just for the instruction of children. If one hears again and again nowadays that children cannot understand it or not yet understand it, if modern Protestant catechetical instruction has almost become the art of distilling out of these plain words written for fathers of the house and their children a doctrine that swings somewhere between Zwingli and Calvin and is presented as Lutheranism simply because it is not blatant Zwinglianism, then one certainly is no longer surprised if the instruction that Article XXIV of the Augsburg Confession has in mind scarcely happens anymore. Then it is even less surprising that “instruction against other false teaching concerning the Sacrament” no longer takes place and that it is regarded as nothing but tactlessness or a violation of Christian love.

Sasse, Herman (2013-01-09). Letters to Lutheran Pastors – Volume 1