The book of Provers has over 50 warnings about being careless and undisciplined in our speech. A major message in many of the warnings is that we do what we speak out of our mouth, our words are self fulfilling prophecy. I work hard at only speaking words that I want to be true or reality in my life, and not saying words that I don’t want to be true of me. That should eliminate most grumbling from my life. An example is I made a personal commitment to not say I am tired though one of the consequences of Parkinsons is “tiredness that is in every cell of the body” most of the time. If I say I am tired I will become more tired, but if I say “it is so fulfilling to be given so much to do by God that I am in need of a good nights sleep so I can do a bunch of work again tomorrow for Him.” The positivenessess of that statement makes me feel good, and I then hardly notice the tiredness. People often do themselves in with their own careless whiny speech.