Matthew Henry and continuators on Proverbs 14:25

25 A true witness delivereth souls: but a deceitful witness speaketh lies.

See here, 1. How much praise is due to a faithful witness: He delivers the souls of the innocent, who are falsely accused, and their good names, which are as dear to them as their lives. A man of integrity will venture the displeasure of the greatest, to bring truth to light and rescue those who are injured by falsehood. A faithful minister, who truly witnesses for God against sin, is thereby instrumental to deliver souls from eternal death. 2. How little regard is to be had to a false witness. He forges lies, and yet pours them out with the greatest assurance imaginable for the destruction of the innocent. It is therefore the interest of a nation by all means possible to detect and punish false-witness-bearing, yea, and lying in common conversation; for truth is the cement of society.