'Living Creatures' in the Bible

Also from the midst of it came the likeness of four living creatures. And this was their appearance; they had the likeness of a man.

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.

And the living creatures ran and returned as the appearance of a flash of lightning.

Now as I beheld the living creatures, behold one wheel upon the earth by the living creatures, with his four faces.

And when the living creatures went, the wheels went by them: and when the living creatures were lifted up from the earth, the wheels were lifted up.

I heard also the noise of the wings of the living creatures that touched one another, and the noise of the wheels over against them, and the noise of a great rushing.