Chapter 31 — Part III: The Decalogue — The Eighth Commandment
Section 36. Inducements To Truthfulness — In order that the faithful may be more disposed to avoid the vice of lying, the pastor should place before them the extreme lowness and disgrace of this sin. In the Sacred Scriptures the devil is called the father of lies; for as, he stood not in the truth, he is a liar and the father thereof.