Everything in the physical world is energy at some level of vibration frequency. Including the body and every cell of the human body functions by this life force of energy. When we speak words, they are sounds of vibrating energy affecting our own energy and cosmic energy. This principle works in every person on the planet irrespective of what they believe. Things spiritual is not energy. Paradoxically things spiritual are of a much higher vibration frequency than earth's electromagnetic energy and can hardly be measured even by the best of modern technology. When a believer of Gospel truth speaks/expresses the Kingdom of God truth they introduce God's power of heaven into earth's energy.