"And Jesus came and spake unto them, saying, All power is given unto me in heaven and in earth."
Matthew 28:18
Jesus discussed power with his disciples here, not because he is bragging but because he is letting them know that he can back them up. Right after this he says "Go ye therefore" (referring back to the power), and asks them to teach and baptize, and promises to be with them.
I think that this same promise is to all of us, if we are on God's errand, as well. When we go out to do as he asks, he will be with us, and he will back us up with his power. Today, let's be willing to do as God asks, trusting that he will be with us and help us along the way.