Letter
Why Natural Family Planning Differs from Contraception by Pope John Paul II (1998)
In 1998 Pope John Paul II wrote a letter to Dr. Anna Cappella, director of the Center for Research and Study on the Natural Regulation of Fertility at Rome’s Catholic University of the Sacred Heart. The occasion was a convention commemorating Humanae Vitae, Pope Paul VI’s 1968 encyclical. Excerpts are reprinted below.
"I hope that everyone will benefit from a closer study of the Church’s teaching on the truth of the act of love in which spouses become sharers in God’s creative action.
The truth of this act stems from its being an expression of the spouses’ reciprocal personal giving, a giving that can only be total since the person is one and indivisible. In the act that expresses their love, spouses are called to make a reciprocal gift of themselves to each other in the totality of their person: nothing that is part of their being can be excluded from this gift. This is the reason for the intrinsic unlawfulness of contraception: it introduces a substantial limitation into this reciprocal giving, breaking that “inseparable connection” between the two meanings of the conjugal act, the unitive and the procreative, which, as Pope Paul VI pointed out, are written by God himself into the nature of the human being (HV, no. 12)."