In the beginning was the Word, and the Word was with God, and the Word was God. He was with God in the beginning. Through him all things were made; without him nothing was made that had been made. John 1:1-3
Yes, we all know that words have power. We know it when we bring up a past misdeed to someone that should have been forgiven and forgotten. We know it when we speak harshly to a child or relative, regardless of the "reasons" we have to justify it. Words have power to hurt, but we can see word's power to help when we can say, "Way to go!" to someone who has achieved something that took lots of effort. We see it when we hear a heartfelt compliment of our cooking, or our children, or our talents. We know it when a friend calls up just when we need some encouragement.
But did you ever really ponder that words hold more than just power to squash or sustain, but actually to create? Jesus, as the Word, was responsible for creation. God said. . . . and it was so. Any of us who aspire to write know that each written word takes on a life of its own when it is a part of a body that becomes "something." So, as writers, we become aware of the power of creation that happens as words find their way to paper.
What else can we create with our words? We can create children with good self-images bolstered by our expressed approval. We can make cooking dinner a pleasure for she who provides it by praising the effort and the result. We can change a heavy heart into one filled with joy when we make someone laugh, or give them a new perspective on a bad situation.
So go ahead and use your words. Be careful with them, but never stingy.