Youcat commented through CCC – Question n. 333 – Part VII.

YOUCAT Question n. 333 – Part VII. Is there a natural law that everyone can know?

(Youcat answer - repeated) If people are to do good and avoid evil, certainty about what is good or evil must be inscribed within them. In fact there is such a moral law that is, so to speak, “natural” to men and can be known in principle by every person by reason.

A deepening through CCC

(CCC 1960) The precepts of natural law are not perceived by everyone clearly and immediately. In the present situation sinful man needs grace and revelation so moral and religious truths may be known "by everyone with facility, with firm certainty and with no admixture of error" (Pius XII, Humani generis: DS 3876; cf. Dei Filius 2: DS 3005) The natural law provides revealed law and grace with a foundation prepared by God and in accordance with the work of the Spirit.   

Reflecting and meditating 

(Youcat comment) The natural moral law is valid for everyone. It tells men what fundamental rights and duties they have and thus forms the real foundation for life together in the family, in society, and in the State. Because our natural knowledge is often troubled by sin and human weakness, a person needs God’s help and his Revelation in order to stay on the right path.

(CCC Comment)

(CCC 1978) The natural law is a participation in God's wisdom and goodness by man formed in the image of his Creator. It expresses the dignity of the human person and forms the basis of his fundamental rights and duties.

(The next question is: What connection is there between the “natural moral law” and the Law of the Old Covenant?)