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13 Ibid., 1-2, q. 100, 3 and ad 1.
14 Pope John Paul II, Encyclical Veritatis splendor, n. 13; the internal citation is
from Vatican Council II Pastoral Constitution on the Church in the Modern
World Gaudium et spes, n. 22.
15 Ibid., n. 13.
16 St. Thomas Aquinas, Summa contra gentiles, 3.122.
17 Grisez, Christian Moral Principles, p. 184.
18 For a fuller discussion of these moral truths see Grisez, Christian Moral
Principles, pp. 205-225; John Finnis, Natural Law and Natural Rights (Oxford:
Oxford University Press, 1980), chapter 3; Finnis, Fundamentals of Ethics
(Washington: Georgetown University Press, 1984), pp. 74-78; William E.
May, An Introduction to Moral Theology (rev. ed.: Huntington, IN: Our Sunday
Visitor, 1994), pp. 77-80.
19 Vatican Council II, Pastoral Constitution on the Church in the Modern
World Gaudium et spes, n. 48.
20 Ibid., nn. 48, 50. In his Encyclical Veritatis splendor Pope John Paul II
explicitly includes “the communion of persons in marriage,” violated by
adultery, among the goods of human persons (n. 13; see also nn. 48, 50, 67,
78, 79). On marriage as a fundamental good of human persons, intrinsically
good, see Germain Grisez, The Way of the Lord Jesus, Vol. 2, Living a Christian
Life (Quincy, IL: Franciscan Press, 1993), pp. 555-584.
21 John Finnis, “Personal Integrity, Sexual Morality, and Responsible
Parenthood,” Anthropos: Rivista di studi sulla persona e la famiglia 1 (1985) 46,
emphasis added. Anthropos is now called Anthropotes.
22 The “nuptial meaning of the body” is developed by Pope John Paul II in
many of his addresses on the “theology of the body” given at his Wednesday
audiences, in particular those given between September 5, 1979 and May 6,
1981. These addresses are found in Pope John Paul II, The Theology of the Body:
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