[13] As for the likeness of the living creatures, their appearance was like burning coals of fire, and like the appearance of lamps: it went up and down among the living creatures; and the fire was bright, and out of the fire went forth lightning. [14] And the living creatures ran and returned as the appearance of a flash of lightning. [15] Now as I beheld the living creatures, behold one wheel upon the earth by the living creatures, with his four faces. [16] The appearance of the wheels and their work was like unto the colour of a beryl: and they four had one likeness: and their appearance and their work was as it were a wheel in the middle of a wheel.