Chapter 31 — Part III: The Decalogue — The Eighth Commandment
Section 25. To deceive by a jocose or officious lie, even though it helps or harms no one, is, notwithstanding, altogether unworthy; for thus the Apostle admonishes us: Putting away lying, speak ye the truth. This practice begets a strong tendency to frequent and serious lying, and from jocose lying men contract the habit of lying, lose all reputation for truth, and ultimately find it necessary, in order to gain belief, to have recourse to continual swearing.