V.4 Put the four expressions together — “wicked, false lips, liar, naughty tongue” — and you will see the power of this verse.
V.9 If a person loves the Lord, he won’t repeat bad stories about another person. It is not that he tries to hide sin, but he doesn’t speak to others about the matter.
V.17 A true friend does not change his attitude toward another when the latter fails. Our Lord Jesus Christ is that Friend. The believer should not be friends with the world, but he (she) should be the best friend they have.