Chapter 31 — Part III: The Decalogue — The Eighth Commandment
Section 39. Again, what more wicked, what more base than, as St. James says, with the same tongue, by which we bless God and the Father, to curse men, who are made after the image and likeness of God, so that out of the same fountain flows sweet and bitter water. The tongue, which was before employed in giving praise and glory to God, afterwards, as far as it is able, by lying treats Him with ignominy and dishonour. Hence liars are excluded from a participation in the bliss of heaven. To David asking, Lord! who shall dwell in thy tabernacle? the Holy Spirit answers: He that speaketh truth in his heart, who hath not used deceit in his tongue.