Let the wicked forsake their ways and the evil person their thoughts. Let them turn to the Lord, and He will have mercy on them, and to our God, for He will freely pardon. Instead of the thornbush will grow the pine tree, and instead of briers the myrtle will grow. This will be for the Lord's renown, for an everlasting sign, which will not be destroyed. He spoke and it came to pass.
Words have power.
Power to create or to destroy. God's creative power that made everything that exists was released by His spoken Word. Then God created human beings in His image or likeness, endowing us with the same life creating powers that God has, and told us to take dominion or authority over everything in creation. We are supposed to be imitating our Creator, like a child imitates a parent. Surely you can understand the power of words.