There are very many who do not fear to deceive their fellow men, but they have been taught, and have been impressed by the Spirit of God, that it is a fearful thing to lie to their Maker. When put under oath they are made to feel that they are not testifying merely before men, but before God; that if they bear false witness, it is to Him who reads the heart and who knows the exact truth. The knowledge of the fearful judgments that have followed this sin has a restraining influence upon them.

Jesus påpegede videre et princip, der ville gøre edsaflæggelse unødvendig. Han lærer, at den nøjagtige sandhed bør være en lov i al tale. »Jeres tale skal være ja, ja! nej, nej! hvad der går ud over det, er af det onde.«