In his Encyclical Letter Arcanum Divinae Sapientiae, Pope Leo XIII reminds is that, ..."what was decreed and constituted in respect to marriage by the authority of God has been more fully and more clearly handed down to us, by tradition and the written Word, through the Apostles, those heralds of the laws of God. To the Apostles, indeed, as our masters, are to be referred the doctrines which 'our holy Fathers, the Councils, and the Tradition of the Universal Church have always taught,'namely, that Christ our Lord raised marriage to the dignity of a sacrament; that to husband and wife, guarded and strengthened by the heavenly grace which His merits Rained for them, He gave power to attain holiness in the married state; and that, in a wondrous way, making marriage an example of the mystical union between Himself and His Church, He not only perfected that love which is according to nature, but also made the naturally indivisible union of one man with one woman far more perfect through the bond of heavenly love. Paul says to the Ephesians: "Husbands, love your wives, as Christ also loved the Church, and delivered Himself up for it, that He might sanctify it. . . So also ought men to love their wives as their own bodies. . . For no man ever hated his own flesh, but nourisheth and cherisheth it, as also Christ doth the Church; because we are members of His body, of His flesh, and of His bones. For this cause shall a man leave his father and mother, and shall cleave to his wife, and they shall be two in one flesh. This is a great sacrament; but I speak in Christ and in the Church." In like manner from the teaching of the Apostles we learn that the unity of marriage and its perpetual indissolubility, the indispensable conditions of its very origin, must, according to the command of Christ, be holy and inviolable without exception."
Pope Pius XI in his famous Encyclical "On Christian Marriage," had this to say:
"First of all, let this remain the unchanged and unshakable foundation: Matrimony was neither established nor restored by man but by God. It has been protected, strengthened, and elevated not by the laws of men, but by those of God, the author of human nature, and of Christ who restored that same nature. Consequently, these laws cannot be changed according to men's pleasure, nor by any agreement of the spouses themselves that is contrary to these laws. This is the teaching of Sacred Scripture (see Gen 1:27; 2:22f.; Mt 19:3ff.; Eph 5:23ff.); this is the constant, universal tradition of the Church; this is the solemn definition of the holy Council of Trent, which in the words of Sacred Scripture teaches and reasserts that the permanent and indissoluble bond of matrimony, its unity and strength, have their origin in God."
The Catechism of the Catholic Church, Nos. 1603-1605, explain marriage in the order of creation:
"The intimate community of life and love which constitutes the married state has been established by the Creator and endowed by him with its own proper laws. . . . God himself is the author of marriage." The vocation to marriage is written in the very nature of man and woman as they came from the hand of the Creator. Marriage is not a purely human institution despite the many variations it may have undergone through the centuries in different cultures, social structures, and spiritual attitudes. These differences should not cause us to forget its common and permanent characteristics. Although the dignity of this institution is not transparent everywhere with the same clarity, some sense of the greatness of the matrimonial union exists in all cultures. "The well-being of the individual person and of both human and Christian society is closely bound up with the healthy state of conjugal and family life."
God who created man out of love also calls him to love the fundamental and innate vocation of every human being. For man is created in the image and likeness of God who is himself love. Since God created him man and woman, their mutual love becomes an image of the absolute and unfailing love with which God loves man. It is good, very good, in the Creator's eyes. And this love which God blesses is intended to be fruitful and to be realized in the common work of watching over creation: "And God blessed them, and God said to them: 'Be fruitful and multiply, and fill the earth and subdue it.'"
Holy Scripture affirms that man and woman were created for one another: "It is not good that the man should be alone." The woman, "flesh of his flesh," his equal, his nearest in all things, is given to him by God as a "helpmate"; she thus represents God from whom comes our help. "Therefore a man leaves his father and his mother and cleaves to his wife, and they become one flesh." The Lord himself shows that this signifies an unbreakable union of their two lives by recalling what the plan of the Creator had been "in the beginning": "So they are no longer two, but one flesh."
Again, we may choose to reject these truths. But in so doing, we lose our grip on sanity as it were. In the words of the late (great) F.J. Sheed:
"..if we see anything - ourself or some other man, or the Universe as a whole or any part of it - without at the same time seeing God holding it there, then we are seeing it all wrong. If we saw a coat hanging on a wall and did not realize that it was held there by a hook, we should not be living in the real world at all, but in some fantastic world of our own in which coats defied the law of gravity and hung on walls by their own power. Similarly if we see things in existence and do not in the same act see that they are held in existence by God, then equally we are living in a fantastic world, not the real world. Seeing God everywhere and all things upheld by Him [such as marriage, my note] is not a matter of sanctity; but of plain sanity, because God is everywhere and all things are upheld by Him...To overlook God's presence is not simply to be irreligious; it is a kind of insanity, like overlooking anything else that is actually there." (Theology and Sanity, p.6).
We see this insanity, in the form of the disease of modernism, in Francis. See here.
This insanity, see here, will continue to metastasize, and will eventually infect much of the Mystical Body of Christ. For men have grown weary of the truth and are prepared to worship the Devil.
Any moment now, the man-God (John 5:43) will reveal himself and demand that very worship. For now, his False Prophet continues to tickle ears, preparing the generation which will turn toward, and enthusiastically embrace, doctrines of demons.