Ex 20, 17 You shall not covet your neighbor's wife

(Ex 20, 17) You shall not covet your neighbor's wife

[17] "You shall not covet your neighbor's house. You shall not covet your neighbor's wife, nor his male or female slave, nor his ox or ass, nor anything else that belongs to him."

(CCC 2514) St. John distinguishes three kinds of covetousness or concupiscence: lust of the flesh, lust of the eyes, and pride of life (Cf. 1 Jn 2:16). In the Catholic catechetical tradition, the ninth commandment forbids carnal concupiscence; the tenth forbids coveting another's goods. (CCC 2515) Etymologically, "concupiscence" can refer to any intense form of human desire. Christian theology has given it a particular meaning: the movement of the sensitive appetite contrary to the operation of the human reason. The apostle St. Paul identifies it with the rebellion of the "flesh" against the "spirit" (Cf. Gal 5:16, 17, 24; Eph 2:3). Concupiscence stems from the disobedience of the first sin. It unsettles man's moral faculties and, without being in itself an offense, inclines man to commit sins (Cf. Gen 3:11; Council of Trent: DS 1515). (CCC 2528) "Everyone who looks at a woman lustfully has already committed adultery with her in his heart" (Mt 5:28). (CCC 2529) The ninth commandment warns against lust or carnal concupiscence. (CCC 2530) The struggle against carnal lust involves purifying the heart and practicing temperance.