. . . How far removed are some modern ideas from the profound understanding of masculinity and femininity found in Divine Revelation! Revelation leads us to discover in human sexuality a treasure proper to the person, who finds true fulfilment in the family but who can likewise express his profound calling in virginity and in celibacy for the sake of the Kingdom of God.
Modern rationalism does not tolerate mystery. It does not accept the mystery of man as male and female, nor is it willing to admit that the full truth about man has been revealed in Jesus Christ. In particular, it does not accept the “great mystery” proclaimed in the Letter to the Ephesians, but radically opposes it. It may well acknowledge, in the context of a vague deism, the possibility and even the need for a supreme or divine Being, but it firmly rejects the idea of a God who became man in order to save man. For rationalism it is unthinkable that God should be the Redeemer, much less that he should be “the Bridegroom”, the primordial and unique source of the human love between spouses. Rationalism provides a radically different way of looking at creation and the meaning of human existence. But once man begins to lose sight of a God who loves him, a God who calls man through Christ to live in him and with him, and once the family no longer has the possibility of sharing in the “great mystery”, what is left except the mere temporal dimension of life? Earthly life becomes nothing more than the scenario of a battle for existence, of a desperate search for gain, and financial gain before all else.
Venerable Pope John Paul II
Letter to Families for the International Year of the Family
February 2, 1994