An analogy of God's workings. A small freezer in a kitchen refrigerator empty. Take that into concept, as all the infinite universe. Heat and cold are the energy forces of God. Water in the air, condenses in the freezer and produces solid matter. Soon thick ice forms on the walls, with repetitive opening and closing of the freezer door over time.
If we unplug the refrigerator and come back latter, the solid ice is melted. The door if left open, will allow the water to evaporate. These changes in matter state, as exampled, are in concept how God's energy power works. God, forms matter from energy, and forms energy from matter. All controlled by the living GOD.