52. In Abraham’s journey towards the future city, the Letter to the Hebrews mentions the blessing which was passed on from fathers to sons (cf. Heb 11:20-21). The first setting in which faith enlightens the human city is the family. I think first and foremost of the stable union of man and woman in marriage. This union is born of their love, as a sign and presence of God’s own love, and of the acknowledgment and acceptance of the goodness of sexual differentiation, whereby spouses can become one flesh (cf. Gen 2:24) and are enabled to give birth to a new life, a manifestation of the Creator’s goodness, wisdom and loving plan. Grounded in this love, a man and a woman can promise each other mutual love in a gesture which engages their entire lives and mirrors many features of faith. Promising love for ever is possible when we perceive a plan bigger than our own ideas and undertakings, a plan which sustains us and enables us to surrender our future entirely to the one we love. Faith also helps us to grasp in all its depth and richness the begetting of children, as a sign of the love of the Creator who entrusts us with the mystery of a new person. So it was that Sarah, by faith, became a mother, for she trusted in God’s fidelity to his promise (cf. Heb 11:11).
53. In the family, faith accompanies every age of life, beginning with childhood: children learn to trust in the love of their parents. This is why it is so important that within their families parents encourage shared expressions of faith which can help children gradually to mature in their own faith. Young people in particular, who are going through a period in their lives which is so complex, rich and important for their faith, ought to feel the constant closeness and support of their families and the Church in their journey of faith. We have all seen, during World Youth Days, the joy that young people show in their faith and their desire for an ever more solid and generous life of faith. Young people want to live life to the fullest. Encountering Christ, letting themselves be caught up in and guided by his love, enlarges the horizons of existence, gives it a firm hope which will not disappoint. Faith is no refuge for the fainthearted, but something which enhances our lives. It makes us aware of a magnificent calling, the vocation of love. It assures us that this love is trustworthy and worth embracing, for it is based on God’s faithfulness which is stronger than our every weakness.