Not quite. Jesus explains it: "Do you not yet understand that whatever enters the mouth goes into the stomach and is eliminated?But those things which proceed out of the mouth come from the heart, and they defile a man.For out of the heart proceed evil thoughts, murders, adulteries, fornications, thefts, false witness, blasphemies.These are the things which defile a man, but to eat with unwashed hands does not defile a man."
Oh how true this is!!! And only God can control it if we let Him control it. And for Him to control it, He needs the Word of God in our lives, and His Spirit flowing through us easily to be able to use the Word in our lives. Jesus also told us that every idle word we speak is being recorded.