Ephesians 5:6 Let no man deceive you with vain words: for because of these things cometh the wrath of God upon the children of disobedience.
Here is the definitions of vain according to the 1828 Websters dictionary.
VAIN, a. [L. vanus; Eng. wan, wane, want.]
1. Empty; worthless; having no substance, value or importance.
2. Fruitless; ineffectual. All attempts, all efforts were vain.
3. Proud of petty things, or of trifling attainments; elated with a high opinion of one's own accomplishments, or with things more showy than valuable; conceited.
4. Empty; unreal; as a vain chimers.
5. Showy; ostentatious.
6. Light; inconstant; worthless.
7. Empty; unsatisfying. The pleasures of life are vain.
8. False; deceitful; not genuine; spurious.
9. Not effectual; having no efficacy
Do you use vain words? Are you vain in general? Do you think everything is about you? Remember the old worldly song that said I bet you think this song is about you, don't you, you're so vain. The word says being vain or using vain words brings the wrath of God down on you. That you are disobedient. I know I will watch my words more closely, will you?