Therefore whatsoever things God commands (and one of these is “You shall not commit adultery”) and whatsoever things are not positively ordered but are strongly advised as good spiritual counsel (and one of these is, “It is a good thing for a man to not touch a woman”)—all of these imperatives are rightly obeyed only when they are measured by the standard of our love of God and our love of our neighbor in God. A Handbook on Faith, Hope and Love
Adultery. This precept is placed before the former one, in the Septuagint; St. Mark x. 19; and St. Luke xviii. 20. Adultery was punished with death, Leviticus xx. 10. All civilized nations have held it in abhorrence, as destructive of all peace, Job xxxi. 11. All other impure actions are forbidden, under different penalties.
The law suppressed physical sins, but our Redeemer condemned even unlawful thoughts. And so “if they do not hear Moses and the prophets, neither will they believe one who rises from the dead.” When will those who neglect to fulfill the less important commandments of the law be strong enough to obey our Savior’s more demanding precepts? This much is clear: anyone whose sayings they decline to fulfill, they have refused to believe.
It is written in the law, “You shall not commit fornication.” This is required in a beneficial way according to the simple sound of the letter by the person who is still entangled in the passions of fleshly impurity. It is necessarily observed in spiritual fashion, however, by one who has already left behind this filthy behavior and impure disposition, so that he also rejects not only all idolatrous ceremonies but also every superstition of the Gentiles and the observance of auguries and omens and of all signs and days and times. And he is certainly not engaged in the divination of particular words or names, which befouls the wholesomeness of our faith. .
