CCC 2336

Jesus 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 Mt 5:27-28. What God has joined together, let not man put asunder.¹²³ Cf. Mt 19:6. The tradition of the Church has understood the sixth commandment as encompassing the whole of human sexuality.