CSDC 141

In the diversity of cultures, the natural law unites peoples, enjoining common principles. Although its application may require adaptations to the many different conditions of life according to place, time and circumstances,²⁷⁰ Cf. Catechism of the Catholic Church, 1957. it remains immutable “under the flux of ideas and customs and supports their progress ... Even when it is rejected in its very principles, it cannot be destroyed or removed from the heart of man. It always rises again in the life of individuals and societies”²⁷¹ Catechism of the Catholic Church, 1958.. Its precepts, however, are not clearly and immediately perceived by everyone. Religious and moral truths can be known “by everyone with facility, with firm certainty and without the admixture of error”²⁷² First Vatican Ecumenical Council, Dei Filius, c. 2: DS 3005DS — Denzinger–Schönmetzer (Enchiridion Symbolorum), p. 588; cf. Pius XII, Encyclical Letter Humani Generis: AAS 42AAS — Acta Apostolicae Sedis (official gazette of the Holy See)Volume 42 (1950) at vatican.va — scanned PDF (1950), 562. only with the help of Grace and Revelation. The natural law offers a foundation prepared by God for the revealed law and Grace, in full harmony with the work of the Spirit²⁷³ Cf. Catechism of the Catholic Church, 1960..