Matthew 12:37, "For by thy words thou shalt be justified, and by thy words thou shalt be condemned."
God created the heavens and the earth and everything that is in the earth by His words (Hebrews 11:3). The whole creation was made by, and responds to, words. Our words, when spoken in faith, release either life or death (Proverbs 18:21) and will affect people, things, and circumstances. We can release the power that is in faith by our words.
Every word counts. There is no such things as an "idle" word which will not work for us or against us. Our words can be our most powerful weapon against the devil, or they can become a snare of the devil (Proverbs 6:2). Faith-filled words can move mountains.
The faith that made Jesus marvel was a faith in the authority of the spoken word (Matthew 8:8, 10). We are to believe in the power of our words. If we begin to speak words in faith that line up with God's Word, then we will have the positive results that follow. But if we continue to speak words of doubt, we will eventually believe them and have the negative things that these words produce. Death or life are in the power of every word we speak.
Faith is released by speaking words. Jesus encouraged us to speak to mountains or to whatever our problem might be. Most people speak to God about their problem, but few follow Jesus' instructions and speak directly to the "mountain." God has put certain things under our authority and we must exercise it. When a problem stands in our way, we must speak to the problem and command it to get out of our way in the name of Jesus. Speak God's Word today. His Words will produce life.