The lip of truth shall be established for ever: but a lying tongue is but for a moment.
– Proverbs 12:19
The lip of truth and the lying tongue are obviously put for a contrast between true and false words. True words endure, have lasting value. False words are momentary. They are usually spoken for some immediate purpose and not for lasting worth. Even if we think of cultural myths that perpetuate from one generation to the next, they will ultimately fall and truth will always stand (Proverbs 19:5, 9; Revelation 21:8).