"Over the heads of the living creatures was the likeness of an expanse that sparkled like awesome ice, stretched out above their heads. Under the expanse their wings were straight, one to the other. Each one had two wings for covering one side of their bodies and two for covering the other side. When I heard the sound of their wings, it was like a sound of rushing waters, like the sound of the Almighty. When they moved, it was like the sound of an army. When they stood still, they would let their wings down."