None of us, in fact, belongs exclusively to himself or herself: one and all are therefore called to take on in their inmost depths their own public responsibility.
Marriage as an institution is thus not an undue interference of society or of authority. The external imposition of form on the most private reality of life is instead an intrinsic requirement of the covenant of conjugal love and of the depths of the human person.
Today, the various forms of the erosion of marriage, such as free unions and "trial marriage", and even pseudo-marriages between people of the same sex, are instead an expression of anarchic freedom that are wrongly made to pass as true human liberation. This pseudo-freedom is based on a trivialization of the body, which inevitably entails the trivialization of the person. Its premise is that the human being can do to himself or herself whatever he or she likes: thus, the body becomes a secondary thing that can be manipulated, from the human point of view, and used as one likes. Licentiousness, which passes for the discovery of the body and its value, is actually a dualism that makes the body despicable, placing it, so to speak, outside the person's authentic being and dignity.
When new forms of legislation are created which relativize marriage, the renouncement of the definitive bond obtains, as it were, also a juridical seal.
In this case, deciding for those who are already finding it far from easy becomes even more difficult. Then there is in addition, for the other type of couple, the relativization of the difference between the sexes.
The union of a man and a woman is being put on a par with the pairing of two people of the same sex, and tacitly confirms those fallacious theories that remove from the human person all the importance of masculinity and femininity, as though it were a question of the purely biological factor.
Such theories hold that man - that is, his intellect and his desire - would decide autonomously what he is or what he is not. In this, corporeity is scorned, with the consequence that the human being, in seeking to be emancipated from his body - from the "biological sphere" - ends by destroying himself.
If we tell ourselves that the Church ought not to interfere in such matters, we cannot but answer: are we not concerned with the human being? Do not believers, by virtue of the great culture of their faith, have the right to make a pronouncement on all this? Is it not their - our - duty to raise our voices to defend the human being, that creature who, precisely in the inseparable unity of body and spirit, is the image of God?
[Human] love is the privileged path that God chose to reveal himself to man and in this love he calls human beings to communion in the Trinitarian life.
This approach enables us also to overcome a private conception of love that is so widespread today. Authentic love is transformed into a light that guides the whole of life towards its fullness, generating a society in which human beings can live. The communion of life and love which is marriage thus emerges as an authentic good for society.
Today, the need to avoid confusing marriage with other types of unions based on weak love is especially urgent. It is only the rock of total, irrevocable love between a man and a woman that can serve as the foundation on which to build a society that will become a home for all mankind.
...there are mounting threats to the natural composition of the family based on the marriage of a man and a woman, and attempts to relativize it by giving it the same status as other radically different forms of union. All this offends and helps to destabilize the family by concealing its specific nature and its unique social role.
...no law made by man can override the norm written by the Creator without society becoming dramatically wounded in what constitutes its basic foundation. To forget this would mean to weaken the family, penalizing the children and rendering the future of society precarious.
Worship pleasing to God can never be a purely private matter, without consequences for our relationships with others: it demands a public witness to our faith. Evidently, this is true for all the baptized, yet it is especially incumbent upon those who, by virtue of their social or political position, must make decisions regarding fundamental values, such as respect for human life, its defence from conception to natural death, the family built upon marriage between a man and a woman, the freedom to educate one's children and the promotion of the common good in all its forms. These values are not negotiable. Consequently, Catholic politicians and legislators, conscious of their grave responsibility before society, must feel particularly bound, on the basis of a properly formed conscience, to introduce and support laws inspired by values grounded in human nature. There is an objective connection here with the Eucharist (cf. 1 Cor 11:27-29).