"Without wood a fire goes out; without gossip, a quarrel dies down." (V20)
Have you ever found yourself in a situation where someone was gossiping and you didn't respond, or you told them that it was wrong and you did not want to be apart of it? How did the situation unfold? I am sure the gossip did not go much further.
Stand for integrity and truth, be kind and do not let gossip continue.
"Like a coating of glaze over earthenware are fervent lips with an evil heart." (V23) You may post spiritual quotes, songs, read the bible and HECK you might even go to church and say your prayers at night... but that does not make you a believer.
Man can do many things that can sometimes look like they are doing right and good, when deep down inside there is an ugly mess growing inside them. The words you speak may seem to be noble and true but if your heart is not right with God...your actions and words mean NOTHING.
The heart is the wellspring of life. Everything starts in the heart and God knows your heart. What is in your heart will eventually be visible.