That is, tends it with exceeding care. And how is she his flesh? Hearken; “This now is bone of my bones,” says Adam, “and flesh of my flesh.” For she is made of matter taken from us. And not only so, but also, “they shall be,” says God, “one flesh.”
“Even as Christ also the Church.” Here he returns to the former example.
Ver. 30. “Because we are members of His body, of His flesh and of His bones.”
Ver. 31. “For this cause shall a man leave his father and mother, and shall cleave to his wife, and the two shall become one flesh.”
Behold again a third ground of obligation; for he shows that a man leaving them that begot him, and from whom he was born, is knit to his wife; and that then the one flesh is, father, and mother, and the child, from the substance of the two commingled. For indeed by the commingling of their seeds is the child produced, so that the three are one flesh. Thus then are we in relation to Christ; we become one flesh by participation, and we much more than the child. And why and how so? Because so it has been from the beginning.
Tell me not that such and such things are so. Do you see not that we have in our own flesh itself many defects? For one man, for instance, is lame, another has his feet distorted, another his hands withered, another some other member weak; and yet nevertheless he does not grieve at it, nor cut it off, but oftentimes prefers it even to the other. Naturally enough; for it is part of himself. As great love as each entertains towards himself, so great he would have us entertain towards a wife. Not because we partake of the same nature; no, this ground of duty towards a wife is far greater than that; it is that there are not two bodies but one; he the head, she the body. And how says he elsewhere “and the Head of Christ is God”? This I too say, that as we are one body, so also are Christ and the Father One. And thus then is the Father also found to be our Head. He sets down two examples, that of the natural body and that of Christ's body. And hence he further adds,
Ver. 32. “This is great mystery: but I speak in regard of Christ and of the Church.”
Why does he call it a great mystery? That it was something great and wonderful, the blessed Moses, or rather God, intimated. For the present, however, says he, I speak regarding Christ, that having left the Father, He came down, and came to the Bride, and became one Spirit. “For he that is joined unto the Lord is one Spirit.” And well says he, “it is a great mystery.” And then as though he were saying, “But still nevertheless the allegory does not destroy affection,” he adds,
Ver. 33. “Nevertheless do ye also severally love each one his own wife even as himself; and let the wife see that she fear her husband.”
For indeed, in very deed, a mystery it is, yea, a great mystery, that a man should leave him that gave him being, him that begot him, and that brought him up, and her that travailed with him and had sorrow, those that have bestowed upon him so many and great benefits, those with whom he has been in familiar intercourse, and be joined to one who was never even seen by him and who has nothing in common with him, and should honor her before all others. A mystery it is indeed. And yet are parents not distressed when these events take place, but rather, when they do not take place; and are delighted when their wealth is spent and lavished upon it.— A great mystery indeed! And one that contains some hidden wisdom. Such Moses prophetically showed it to be from the very first; such now also Paul proclaims it, where he says, “concerning Christ and the Church.”
However not for the husband's sake alone it is thus said, but for the wife's sake also, that “he cherish her as his own flesh, as Christ also the Church,” and, “that the wife fear her husband.” He is no longer setting down the duties of love only, but what? “That she fear her husband.” The wife is a second authority; let not her then demand equality, for she is under the head; nor let him despise her as being in subjection, for she is the body; and if the head despise the body, it will itself also perish. But let him bring in love on his part as a counterpoise to obedience on her part. For example, let the hands and the feet, and all the rest of the members be given up for service to the head, but let the head provide for the body, seeing it contains every sense in itself. Nothing can be better than this union.
And yet how can there ever be love, one may say, where there is fear? It will exist there, I say, preëminently. For she that fears and reverences, loves also; and she that loves, fears and reverences him as being the head, and loves him as being a member, since the head itself is a member of the body at large. Hence he places the one in subjection, and the other in authority, that there may be peace; for where there is equal authority there can never be peace; neither where a house is a democracy, nor where all are rulers; but the ruling power must of necessity be one. And this is universally the case with matters referring to the body, inasmuch as when men are spiritual, there will be peace. There were “five thousand souls,” and not one of them said, “that anything of the things which he possessed was his own”, but they were subject one to another; an indication this of wisdom, and of the fear of God. The principle of love, however, he explains; that of fear he does not. And mark, how on that of love he enlarges, stating the arguments relating to Christ and those relating to one's own flesh, the words, “For this cause shall a man leave his father and mother.” Whereas upon those drawn from fear he forbears to enlarge. And why so? Because he would rather that this principle prevail, this, namely, of love; for where this exists, everything else follows of course, but where the other exists, not necessarily. For the man who loves his wife, even though she be not a very obedient one, still will bear with everything. So difficult and impracticable is unanimity, where persons are not bound together by that love which is founded in supreme authority; at all events, fear will not necessarily effect this. Accordingly, he dwells the more upon this, which is the strong tie. And the wife though seeming to be the loser in that she was charged to fear, is the gainer, because the principal duty, love, is charged upon the husband. “But what,” one may say, “if a wife reverence me not?” Never mind, you are to love, fulfill your own duty. For though that which is due from others may not follow, we ought of course to do our duty. This is an example of what I mean. He says, “submitting yourselves one to another in the fear of Christ.” And what then if another submit not himself? Still obey thou the law of God. Just so, I say, is it also here. Let the wife at least, though she be not loved, still reverence notwithstanding, that nothing may lie at her door; and let the husband, though his wife reverence him not, still show her love notwithstanding, that he himself be not wanting in any point. For each has received his own.
Source: Homilies on Ephesians (New Advent)