These Live in the Human Heart

In Veritatis Splendor, Pope John Paul II, quoting St. Paul, discusses how the Gentiles, even though they do not have explicit Divine Revelation or the Law as did the Israelites, often manage to follow the Ten Commandments nonetheless, because they have the benefit of the natural moral law. “When Gentiles who have not the law do by nature what the law requires, they … show that what the law requires is written on their hearts …”(1)
Footnote:
1. Romans 2:14-15;cited in Veritatis Splendor, #57.