In addition, it would be well to preach to the parents also, and such as bear their office, as to how they should deport themselves toward those who are committed to them for their government. For although this is not expressed in the Ten Commandments, it is nevertheless abundantly enjoined in many places in the Scriptures. And God desires to have it embraced in this commandment when He speaks of father and mother. For He does not wish to have in this office and government knaves and tyrants; nor does He assign to them this honor, that is, power and authority to govern, that they should have themselves worshiped; but they should consider that they are under obligations of obedience to God; and that, first of all, they should earnestly and faithfully discharge their office, not only to support and provide for the bodily necessities of their children, servants, subjects, etc., but, most of all, to train them to the honor and praise of God. Therefore do not think that this is left to your pleasure and arbitrary will, but that it is a strict command and injunction of God, to whom also you must give account for it.

But here again the sad plight arises that no one perceives or heeds this, and all live on as though God gave us children for our pleasure or amusement, and servants that we should employ them like a cow or ass, only for work, or as though we were only to gratify our wantonness with our subjects, ignoring them, as though it were no concern of ours what they learn or how they live; and no one is willing to see that this is the command of the Supreme Majesty, who will most strictly call us to account and punish us for it; nor that there is so great need to be so seriously concerned about the young. For if we wish to have excellent and apt persons both for civil and ecclesiastical government we must spare no diligence, time, or cost in teaching and educating our children, that they may serve God and the world, and we must not think only how we may amass money and possessions for them. For God can indeed without us support and make them rich, as He daily does. But for this purpose He has given us children, and issued this command that we should train and govern them according to His will, else He would have no need of father and mother. Let every one know therefore, that it is his duty, on peril of losing the divine favor, to bring up his children above all things in the fear and knowledge of God, and if they are talented, have them learn and study something, that they may be employed for whatever need there is [to have them instructed and trained in a liberal education, that men may be able to have their aid in government and in whatever is necessary].

If that were done, God would also richly bless us and give us grace to train men by whom land and people might be improved and likewise well educated citizens, chaste and domestic wives, who afterwards would rear godly children and servants. Here consider now what deadly injury you are doing if you be negligent and fail on your part to bring up your child to usefulness and piety, and how you bring upon yourself all sin and wrath, thus earning hell by your own children, even though you be otherwise pious and holy. And because this is disregarded, God so fearfully punishes the world that there is no discipline, government, or peace, of which we all complain, but do not see that it is our fault; for as we train them, we have spoiled and disobedient children and subjects. Let this be sufficient exhortation; for to draw this out at length belongs to another time.

from the Large Catechism