Revelation 4:6

(7) And before the throne [there was] a sea of glass like unto crystal: and in the midst of the throne, and round about the throne, [were] four beasts full of eyes before and behind.

(7) By instruments used, in that he has both a most ready treasury and a workhouse excellently furnished with all things, to the executing of his will, which things flow from his commandment, as repeated in (Revelation 15:2) and has also the angels ready administers of his counsel and pleasure to all parts of the world, continually watching, (in this verse) working by reason otherwise than the instruments without life last mentioned, courageous as lions, mighty as bulls, wise as men, swift as eagles (Revelation 4:7) most apt to all purposes as furnished with wings on every part, most piercing of sight, and finally, pure and holy spirits always in continual motion (Revelation 4:8).