As for their appearance, all four had the same form, like a wheel within a wheel.
We have also explained this part. He says that all had the same aspect, not because God always governs events in an equable manner, for experience opposes this. But he means that the appearance was the same, because the variety which causes darkness to our eyes, does not remove the perpetual and well-arranged tenor of the works of God.
We have here a further account of the vision of God's glory which Ezekiel saw, here intended to introduce that direful omen of the departure of that glory from them, which would open the door for ruin to break in. I.
Commenting on Ezekiel 10:8-22
And as for their appearances, they four had one likeness,.... They were exactly like one another; they were all composed of the same matter, had all the colour of a beryl stone, were all in the same form of a wheel; and in matter, form, and shape, entirely tallied and agreed one with another, as true Gospel churches do: See Gill on Eze 1:16; as...