Ephesians 5:31

Finally, "there shall be," said He, "two in one flesh," not three nor four. On any other hypothesis, there would no longer be "one flesh," nor "two (joined) into one flesh." These will be so, if the conjunction and the growing together in unity take place once for all. if, however, (it take place) a second time, or oftener, immediately (the flesh) ceases to be "one," and there will not be "two (joined) into one flesh," but plainly one rib (divided) into more. But when the apostle interprets, "The two shall be (joined) into one flesh" of the Church and Christ, according to the spiritual nuptials of the Church and Christ (for Christ is one, and one is His Church), we are bound to recognise a duplication and additional enforcement for us of the law of unity of marriage, not only in accordance with the foundation of our race, but in accordance with the sacrament of Christ. From one marriage do we derive our origin in each case; carnally in Adam, spiritually in Christ.

You are to respect the first law [of creation], he says in effect, which was laid down along with the fashioning of the woman and implanted in human nature.… This is the fruit of marriage: One child comes of two partners. The apostle, having recalled …

For thus will it be most certainly agreed that the Church is formed out of His bones and flesh; and it was for this cause that the Word, leaving His Father in heaven, came down to be "joined to His wife; "

Above all, with His holy and undefiled hands He formed man, the most excellent [of His creatures], and truly great through the understanding given him — the express likeness of His own image. For thus says God: "Let us make man in our image, and after our likeness. So God made man; male and female He created them." [Genesis 1:26-27] Having thus finished all these things, He approved them, and blessed them, and said, "Increase and multiply." [Genesis 1:28] We see, then, how all righteous men have been adorned with good works, and how the Lord Himself, adorning Himself with His works, rejoiced. Having therefore such an example, let us without delay accede to His will, and let us work the work of righteousness with our whole strength.

Moreover, that Nicostratus, having lost the diaconate of sacred administrations, because he had abstracted the Church's money by a sacrilegious fraud, and disowned the deposits of the widows and orphans, did not wish so much to come into Africa as to escape thither from the city, from the consciousness of his rapines and his frightful crimes. And now a deserter and a fugitive from the Church, as if to have changed the clime were to change the man, he goes on to boast and announce himself a confessor, although he can no longer either be or be called a confessor of Christ who has denied Christ's Church. For when the Apostle Paul says, "For this cause shall a man leave his father and mother, and shall cleave unto his wife; and they two shall be one flesh. This is a great mystery; but I speak concerning Christ and the Church; " -when, I say, the blessed apostle says this, and with his sacred voice testifies to the unity of Christ with the Church, cleaving to one another with indivisible links, how can he be with Christ who is not with the spouse of Christ, and in His Church? Or how does he assume to himself the charge of ruling or governing the Church, who has spoiled and wronged the Church of Christ?

"For this cause shall a man leave his father and mother, and shall cleave to his wife, and the twain shall become one flesh." Behold again a third ground of obligation; for he shows that a man leaving them that begat 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. Now why did he not say of the wife also, She shall be joined unto her husband? Why, I say, is this? Because he was discoursing concerning love, and was discoursing to the husband. For to her indeed he discourses concerning reverence, and says, "the husband is the head of the wife", and again, "Christ is the Head of the Church." Whereas to him he discourses concerning love, and commits to him this province of love, and declares to him that which pertains to love, thus binding him and cementing him to her. For the man that leaves his father for the sake of his wife, and then again, leaves this very wife herself and abandons her, what forbearance can he deserve?

The Apostle exhorted the Ephesians above to love their wives. He did this in two ways: both by offering the example of Christ's love for the Church, and by the love a man has for himself (5:25), now he gives a third encouragement drawn from …

Here is yet another example, namely: when someone, having left his parents, is united with her. And he did not say: will live together with her, but: "shall cleave," indicating an inseparable union. And the words "one flesh" are understood also simply, as the great …

Since each of the spiritual unions signified in the Sacrament of matrimony is a union of one as agent and infuser, and of the other as patient and receiver; and this by the bond of love, which proceeds from pure will: hence it is that …

For this cause shall a man leave his father and mother,.... These words contain the law of marriage, and are cited from Gen 2:24; and declare what ought to be, and are a prophecy of what should be; and are observed against polygamy, and to stir up mutual affection; See Gill on Mat 19:5.

For this cause - Ἀντὶ τόυτου Anti toutou. This verse is a quotation from Gen 2:24, and contains the account of the institution of marriage. The meaning of the phrase rendered “for this cause” is, “answerably to this;” or corresponding to this - that is, to what Paul had just said of the union of believers and the Redeemer. On the meaning of this verse, see the notes on Mat 19:

In natural marriage, husband and wife combine the elements of one perfect human being: the one being incomplete without the other. So Christ, as God-man, is pleased to make the Church, the body, a necessary adjunct to Himself, the Head. He is the archetype of the Church, from whom and according to whom, as the pattern, she is formed.

Shall be joined unto his wife - Προσκολληθησεται· He shall be glued or cemented to her; and, as a well-glued board will sooner break in the whole wood than in the glued joint, so death alone can part the husband and wife; and nothing but death should dissolve their affection. See the notes on Gen 2:21-24 (note).

Thus, Sir Arthur Conan Doyle, an intelligent man in other matters, says that there is only a "theological" opposition to divorce, and that it is entirely founded on "certain texts" in the Bible about marriages. This is exactly as if he said that a belief …

Yet there is a difference, and it is just what I suggested. The Eastern mysticism is an ecstasy of unity; the Christian mysticism is an ecstasy of creation, that is of separation and mutual surprise. The latter says, like St. Francis, "My brother fire and …