§2262In the Sermon on the Mount, the Lord recalls the commandment, "You shall not kill,"62 and adds to it the proscription of anger, hatred, and vengeance. Going further, Christ asks his disciples to turn the other cheek, to love their enemies.63 He did not defend himself and told Peter to leave his sword in its sheath.64 Legitimate defense

§2336Jesus came to restore creation to the purity of its origins. In the Sermon on the Mount, he interprets God's plan strictly: "You have heard that it was said, 'You shall not commit adultery.' But I say to you that every one who looks at a woman lustfully has already committed adultery with her in his heart."122 What God has joined together, let not man put asunder.123 The tradit…

§2380Adultery refers to marital infidelity. When two partners, of whom at least one is married to another party, have sexual relations - even transient ones - they commit adultery. Christ condemns even adultery of mere desire.170 The sixth commandment and the New Testament forbid adultery absolutely.171 The prophets denounce the gravity of adultery; they see it as an image of the si…

Christ did not abrogate the natural precepts of the law, but rather fulfilled and extended them. He removed the yoke and bondage of the old law, so that mankind, being now set free, might serve God with that trustful piety which becomes sons. 1. And that the Lord did not abrogate the natural [precepts] of the law, by which man is justified, which also those who were justified b…

2. For beginning from those passions, which most belong to our whole race, anger, I mean, and desire (for it is these chiefly that bear absolute sway within us, and are more natural than the rest); He with great authority, even such as became a legislator, both corrected them, and reduced them to order with all strictness. For He said not that the adulterer merely is punished; …

Thou shalt not commit adultery. These commandments now following are easily understood from the preceding; for they are all to the effect that we beware of doing any injury to our neighbor. They are arranged in fine order. In the first place, his own person is addressed. Then the next commandment proceeds to the nearest treasure next his body, namely, his wife, who is one flesh…

Q. Does God, in this commandment, forbid only such scandalous sins as adultery? A. We are temples of the Holy Spirit, body and soul, and God wants both to be kept clean and holy. That is why he forbids everything which incites unchastity, whether it be actions, looks, talk, thoughts, or desires.