But shun profane and vain babblings: for they will increase unto more ungodliness. (KJV) ( 2 Timothy 2:16 )
Foolish talk includes talking negatively about another person (gossip) and spreading false information about another person (slander).
Instead of worthless talk, set your mind on building up and being a light for others.
Not only is this more rewarding, it also leads to a greater sense of inner peace.
Are a large portion of the words coming from your mouth considered foolish talk?