Ephesians 6:2

As a man in forming a body, places the head first, after that the neck, then the feet, so does the blessed Paul proceed in his discourse. He has spoken of the husband, he has spoken of the wife, who is second in authority, he now goes on by gradual advances to the third rank-which is that of children. For the husband has authority over the wife, and the husband and the wife over the children. Here he has not a word of discourse concerning Christ, not a word on high subjects, for he is as yet addressing his discourse to tender understandings. And it is for this reason, moreover, that he makes his exhortation short, inasmuch as children cannot follow up a long argument. For this reason also he does not discourse at all about a kingdom, (because it does not belong to the tender age of childhood to understand these subjects,) but what a child's soul most especially longs to hear, that he says, namely, that it shall "live long." For if any one shall enquire why it is that he omitted to discourse concerning a kingdom, but set before them the commandment laid down in the law, he does this because he speaks to them as infantile, and because he is well aware that if the husband and the wife are thus disposed according to the law which he has laid down, there will be but little trouble in securing the submission of the children. For whenever any matter has a good and sound and orderly principle and foundation, everything will thenceforward go on with method and regularity, with much facility: the more difficult thing is to settle the foundation, to lay down a firm basis. "Children," saith he, "obey your parents in the Lord," that is, according to the Lord. This, he means to say, is what God commands you. But what then if they shall command foolish things? Generally a father, however foolish he may be himself, does not command foolish things. However, even in that case, the Apostle has guarded the matter, by saying, "in the Lord"; that is, wherever you will not be offending against God. So that if the father be a gentile or a heretic, we ought no longer to obey, because the command is not then, "in the Lord." But how is it that he says, "Which is the first commandment"? For the first is, "Thou shalt not commit adultery;-Thou shalt not kill." He does not speak of it then as first in rank, but in respect of the promise. For upon those others there is no reward annexed, as being enacted with reference to evil things, and to departure from evil things. Whereas in these others, where there is the practice of good, there is further a promise held out. And observe how admirable a foundation he has laid for the path of virtue, that is, honor and reverence towards parents. When he would lead us away from wicked practices, and is just about to enter upon virtuous ones, this is the first thing he enjoins, honor towards parents; inasmuch as they before all others are, after God, the authors of our being, so that it is reasonable they should be the first to reap the fruits of our right actions; and then all the rest of mankind. For if a man have not this honor for parents he will never be gentle toward those unconnected with him.