Jesus is the Word of God (John 1:1-3) and in His Word there is power. The entire universe, the earth that we live on, and all things on earth were created by and through the Word ("Then God said..."). Our entire world was spoken into existence by the Word of God (Genesis 1). The power of the Word of God is evident in His creation. It is also evident throughout the ministry of Jesus while He was here on earth.
The centurion in Matthew 8:5-13 knew that His Word was powerful. One of this centurion's servants was very ill. Knowing that Jesus could heal the servant, the centurion sought Him out. When he found Jesus, the centurion, who believed that he was not worthy to have Jesus come to his home, asked Jesus just to speak healing into the servant. He knew that the Word had the power to heal. Jesus spoke, the centurion returned home, and the servant was healed. There is power in the Word!
There are many other instances in Scripture where the power of the Word is shown. Among them are the paralytic whom Jesus both forgave and healed just by speaking (Matthew 9:2-8). Then there was the leper whose leprosy left him as soon as Jesus said it was healed (Mark 1:40-42). Jesus spoke and cast a legion of demons out of a man in the country of the Gadarenes (Mark 5:1-13) and cast out a deaf and dumb spirit that had been living in a young man since childhood. With words alone, He restored a man's sight (Luke 18:35-43) and raised His friend Lazarus from the dead (John 11:38-44). There is power in the Word!
There is also great power in the words of Jesus' teachings, such as those found in chapters 5 through 7 of the Gospel of Matthew. Those words are a guide for life. But, some of the most powerful words spoken by Jesus, the Word of God, are the three simple words that he uttered just before giving up His last breath on the cross of Calvary: "It is finished." With those three words, Jesus accomplished what no man possibly could. He took upon Himself the punishment for all of our sins and restored our relationship with God. There is power in the Word!