Matthew Poole and continuators on Ezekiel 1:17

17 When they went, they went upon their four sides: and they returned not when they went.

The living Creatures, indeed the Wheeles moved according to the motion of the living Creatures, but it will as well agree with the Truth as it better agrees with the Grammar of the words to, say this (they) i. e. the Wheels.

The Wheeles being supposed spherical or round every way as a Globe, by an exact and curious framing of two Wheels one in the other; the four semi-circles which are in two whole wheels, may be well taken for these four sides on which these wheeles do move, and such a wheel will readily be turned to all points of the compass, as a Ball on a Billiard Table.

They needed not go back to turn as we see other Chariots or Coaches must do, putting back somewhat to alter their course, or returned not till they came to their journeys end, or nothing could divert them, or put them out of their course. So firm and sure are the methods, so unalterable and constant the purposes of God, and so invariable the obedience and observance of Holy Angels. So subject to the just sovereign Will of God are all second Causes.