See this online text:
- “Every Marital Act Ought to be Open to New Life: Toward a Clearer Understanding”, by Germain Grisez, Joseph Boyle, John Finnis & William E. May. Reprinted from The Thomist, 52, 3 (July 1988): pp. 365-426 (copyright © Dominican Fathers, Province of St. Joseph, 1988). Available in pdf format through this page of The Way of the Lord Jesus.
On the anniversary of the issuance of the Encyclical “Humanae Vitae”. See also these related texts:
- “Allocution to the Italian Association of Large Families”, by the Venerable Pope Pius XII, January 20, 1958. Under the title “The Large Family”, from The Pope Speaks (Spring 1958), it may be read online on this page of Catholic Culture. Excerpts of the address may be found in “Family”, a collection of statements of the magisterium, on this page of the United States Conference of Catholic Bishops.
- Apostolic Exhortation “Familiaris Consortio” on the Role of the Christian Family in the Modern World, by Pope St. John Paul II (22 November 1981). May be read online (on this page) of the Holy See, and on this page of CBCP for Life.
- Birth control: A Statement of Christian Doctrine against the Neo-Malthusians, by Sutherland, Halliday (New York: P. J. Kenedy & sons, 1922). Available at Manybooks.net, Internet Archive and Open Library. Apologetics, Bioethics, Ethics, Morals.
- Carta Encíclica «Veritatis splendor» sobre Algunas Cuestiones Fundamentales de la Enseñanza Moral de la Iglesia, del Papa San Juan Pablo II (6 de agosto 1993). Disponible en esta pagina de la Santa Sede; en esta pagina de ACI Prensa; en esta pagina del Archidiocesis de Valencia.
- “Contraception and the Infallibility of the Ordinary Magisterium,” by Germain Grisez and John C. Ford, S.J., Theological Studies, 39 (1978): 258–312. Available in PDF format at The Way of the Lord Jesus (copyright 2009).
- Contraception and the Natural Law, by Germain Grisez (Milwaukee: Bruce, 1965). Available in PDF format through this page of The Way of the Lord Jesus (copyright 2009). The webpage states that the author “reserves the right to make and distribute copies for sale. But he hereby grants everyone the right to print out and distribute without charge copies of the entire work or part of it provided the source is identified and this copyright information included.”
- Cultural Apologetics (articles), by Jason Evert, Matt Fradd, Dr. Janet Smith, Ryan T. Anderson, Abby Johnson. Available on this page of the Fellowship of Catholic University Students, which describes it as a series of articles “designed to help you and your disciples wrestle with teachings of the Church, which are often difficult in today’s cultural context.”
- Draft of a Dogmatic Constitution on Chastity, Marriage, the Family, and Virginity, by the Preparatory Theological Commission for the Second Vatican Council, translated by Fr. Joseph A. Komonchak (2012). Available in pdf format (on this page) at In Verbo Veritatis.
- Encyclical Letter “Veritatis splendor”, by Pope St. John Paul II (6 August 1993). Available at the Holy See and at IntraText. [According to Wikipedia: “The encyclical is one of the most comprehensive and philosophical teachings of moral theology in the Catholic tradition”]
- Exhortación Apostólica “Familiaris Consortio” sobre la misión de la familia cristiana en el mundo actual, del Papa San Juan Pablo II (22 de noviembre 1981). Disponible en la Santa Sede, y Catholic.net, y la Vicaria de Pastoral, Arquidiocesis Primada de Mexico.
- “Familiaris Consortio: The Biblical and Theological Foundation of an Adequate Anthropology”, by Joseph C. Atkinson, Life and Learning, Volume XI (2001), p. 248, which may be read at University Faculty for Life;
- “Familiaris consortio and the Current Cultural and Social Change: Presentation for the Plenary Assembly Pontifical Council for the Family, Nov 30, 2011”, by Michael Maria Waldstein, which is available at the Pontificium Consilium pro Familiam; and
- “Familiaris Consortio—On the Role of the Christian Family in the Modern World”, by Helen Hull Hitchcock (Nov 1, 2001), available at Women for Faith & Family.
- Letter to Families “Gratissimam Sane”, by Pope St. John Paul II, February 2, 1994. May be read online at the Holy See. An ebook of the text, with an Introduction by Carl A. Anderson, Supreme Knight of the Knights of Columbus (New Haven, CT: Knights of Columbus Supreme Council, 2001), is available in pdf format (here). A shortened version or summary of the letter, by Fr Richard Aladics, is available in pdf format on this page at XT3. The text is offered for sale on this page at EWTN Religious Catalogue; on this page at Seton Educational Media. An ebook, Letter to Families: The Saint’s Reflections on the Grandeur of Marriage and Family Life, by St. John Paul II, with a Foreword, by Most Rev. Charles Chaput, Archbishop of Philadelphia, is offered for sale on this page at Sophia Institute Press.See also the essay “Families Get a Special Letter from Pope John Paul II”, by Father John McCloskey, at CatholiCity.
- Lettre Encyclique “Casti Connubii” sur le Mariage Chrétien Considéré au Point de Vue de la Condition Présente, des Nécessités, des Erreurs et des Vices de la Famille et de la Société, du Souverain Pontife Pie XI (31 décembre 1930). Disponible sur le site officiel du Saint-Siège. [D’apres Wikipedia : « Elle forme l’essentiel de l’enseignement doctrinal de l’Église sur le sacrement matrimonial et la vie conjugale. »]
- Natural Family Planning: The Complete Approach, First Edition, by John and Sheila Kippley (2009, last update February 2010). With Permission to Publish from the Vicar General of the Archdiocese of Cincinnati. Available in PDF format (on this page) at Natural Family Planning International.
- The Sixth and Ninth Commandments: Sexual Morality, by Peter Kreeft (New Haven, CT: Knights of Columbus Supreme Council – Catholic Information Service, 2001). With Imprimatur. The ebook may be read online and is available in pdf format (here), and the audiobook is available in mp3 format through this page of the Knights of Columbus Supreme Council.
- Theology of the Body for Families & Single People, plus Family Chastity Formation in Virtue and Purity of Heart: Universal Truths about Human Sexuality for People of All Ages, with Extensive References to the Official Teachings of the Roman Catholic Church (Kettle River, Minnesota: Communitas Dei Patris, 2006-2017). (Rev: 1/25/2017). Available in pdf format (here) through this page of Family Prayer Night.
- Theology of the Body: Weekly Audiences on the Subject of the Redemption of the Body and the Sacramentality of Marriage, September 5, 1979 – November 28, 1984, by Pope St. John Paul II. May be read through this page of the United States Conference of Catholic Bishops; through this page of the EWTN Library; through this table of contents of Catechesis of the Popes, which also has a prefatory page and a list of ecclesiastical documents on marriage and the family; through this page of Average Joe Catholic; and the Internet Archive Wayback Machine (being the 11 December 2017 snapshot of a page from the sadly defunct website Catholic Primer).
- The Truth and Meaning of Human Sexuality: Guidelines for Education Within the Family, by the Pontifical Council for the Family (November 21, 1995). May be read online at the Holy See, Simbahayan sa Maynila, Family Life Center,EWTN Library, Women for Faith & Family, and New Advent, with an excerpt at the National Coalition of Clergy and Laity. Available in PDF format at Super Flumina. Its principles are summarized at Women for Faith & Family and AD2000.
- World Youth Alliance White Paper on HIV/AIDS, by Meghan Grizzle, J.D., reviewed by Dr. Timothy Flanigan, Professor of Medicine, Infectious Diseases, Brown University Medical School (New York: World Youth Alliance). Available in PDF format, together with a Fact Sheet on HIV/AIDS, through this page (CLICK HERE) of the World Youth Alliance. [The document summarizes the empirical evidence on the effectiveness of various epidemiological strategies employed against the spread of HIV/AIDS. A related discussion is provided in this article of the Ugandan newspaper The Observer.]
Other related texts are listed in the page “Marriage and the Family“. For other online texts and legally free ebooks, you may access the List of Free eBooks (Arranged by Title) and the List of Free eBooks (Grouped by Subject).
“[I]t is never lawful, even for the gravest reasons, to do evil that good may come of it (cf. Rom 3:8) — in other words, to intend directly something which of its very nature contradicts the moral order, and which must therefore be judged unworthy of man, even though the intention is to protect or promote the welfare of an individual, of a family or of society in general” (Pope Paul VI, Humanae Vitae, No. 14, as quoted by Pope St. John Paul II, Veritatis Splendor, No. 80)