In its most profound reality, love is essentially a gift; and conjugal love, while leading the spouses to the reciprocal "knowledge" which makes them "one flesh," does not end with the couple, because it makes them capable of the greatest possible gift, the gift by which they become cooperators with God for giving life to a new human person. Thus the couple, while giving themselves to one another, give not just themselves but also the reality of children, who are a living reflection of their love, a permanent sign of conjugal unity and a living and inseparable synthesis of their being a father and a mother.Love in marriage is therefore necessarily about the "other".
God created man in His own image and likeness: calling him to existence through love, He called him at the same time for love. God is love and in Himself He lives a mystery of personal loving communion. Creating the human race in His own image and continually keeping it in being, God inscribed in the humanity of man and woman the vocation, and thus the capacity and responsibility, of love and communion. Love is therefore the fundamental and innate vocation of every human being. As an incarnate spirit, that is a soul which expresses itself in a body and a body informed by an immortal spirit, man is called to love in his unified totality. Love includes the human body, and the body is made a sharer in spiritual love. Christian revelation recognizes two specific ways of realizing the vocation of the human person in its entirety, to love: marriage and virginity or celibacy. Either one is, in its own proper form, an actuation of the most profound truth of man, of his being "created in the image of God."
Our imaging of God is not merely a spiritual imaging, but a bodily one as well.
The human body, with its sex, and its masculinity and femininity seen in the very mystery of creation, is not only a source of fruitfulness and procreation, as in the whole natural order. It includes right from the beginning the nuptial attribute, that is, the capacity of expressing love, that love in which the person becomes a gift and—by means of this gift—fulfills the meaning of his being and existence.Our meaning is "caught up" into the revelation of God, which is revealed through our bodies and giftedness!
The heart has become a battlefield between love and lust. The more lust dominates the heart, the less the heart experiences the nuptial meaning of the body. It becomes less sensitive to the gift of the person, which expresses that meaning in the mutual relations of man and woman. Certainly, that lust which Christ speaks of in Matthew 5:27-28 appears in many forms in the human heart. It is not always plain and obvious. Sometimes it is concealed, so that it passes itself off as love, although it changes its true profile and dims the limpidity of the gift in the mutual relationship of persons. Does this mean that it is our duty to distrust the human heart? No! It only means that we must keep it under control.JPII pray for us