He does not tolerate the fact that someone else 'wants' or demands something from him in the name of an objective truth. The personalist aspect of Christian marriage implies an integral vision of man which, in the light of faith, takes up and confirms whatever we can know by our natural powers. It is characterized by a sound realism in its conception of personal freedom, placed between the limits and influences of a human nature burdened by sin and the always sufficient help of divine grace. This view proper to Christian anthropology also includes an awareness of the need for sacrifice, for the acceptance of suffering and struggle as indispensable realities for being faithful to one's duties. A correct evaluation of the personalist elements also requires that we keep in mind the essential nature of the person and, concretely, the essential nature of his conjugal dimension and the resulting natural inclination to marriage.
Marriage certainly has an essential nature, described m can.
This essential reality is. Consequently, in assessing the capacity or the act of consent necessary for the celebration of a valid marriage, one cannot demand what it is not possible to require of the majority of people. It is not a question of a pragmatic or convenient minimalism, but of a realistic view of the human person, as a being always growing, called to make responsible choices with his inborn abilities, continuously enriching them by his own efforts and the help of grace. However, there remains the difficult task, as you well know, of determining, including with the help of the human sciences, that minimum without which one cannot speak of the capacity or sufficient consent for a true marriage. All this clearly shows how exacting and demanding is the task entrusted to the Roman Rota.