16 There are six things that the Lord hates,
seven that are an abomination to him:
17 haughty eyes, a lying tongue,
and hands that shed innocent blood,
18 a heart that devises wicked plans,
feet that make haste to run to evil,
19 a false witness who breathes out lies,
and one who sows discord among brothers.
– Proverbs 6:16–19
Lying insults not only your neighbor, whom you may manage to fool, but also God, whom you can never fool. A truthtelling, promise-keeping God who “cannot lie” (Titus 1:2, NEB; also Numbers 23:19; 1 Samuel 15:29), and who wants to see in us his own moral image, naturally “hates . . . a lying tongue . . . a false witness who breathes out lies” (Proverbs 6:16–19). Lying is part of Satan’s image, not God’s, and we should not wonder that “everyone who loves and practices falsehood” should thereby exclude himself from God’s city (Revelation 22:15; cf. 21:27). There is no godliness without truthfulness. Lord, have mercy!
– J.I. Packer
Keeping the Ten Commandments, page 97