Aquinas teaches the three precepts of Natural Law are (1) self-preservation (2) procreation & education of offspring, and (3) natural inclination toward the good, God.
The vehicle by which man knows Natural Law is reason and understanding. Here, Aquinas makes a second important distinction – some men will understand more, some less. Aquinas is not promoting an egalitarian view of reason. All men may know, but all men will not know equally.
The following list is taken from the Summa Theologica Prima Secundae question 93, entitled, The Eternal Law. A proper understanding of the Eternal Law of God, the Divine Government, serves as an excellent foundation to issues such as politics, natural law, divine providence, hell, and nature.
Drunk off its political and scientific successes, modern thought and practice have abandoned the modest and moderate beginnings of political modernity.
Listers, though not an exhaustive list, we want to bring several Catholic documents to the forefront 0f the discussion of family and marriage. One of the many reasons our society cannot have a thoughtful conversation on homosexuality is because we’ve lost our vocabulary to even discuss the family. Too often a conversation on family, sex, or homosexuality devolves...
"[H]aving forbidden all unlawful marriage, and all unseemly practice, and the union of women with women and men with men..."