Matthew Poole and continuators on Ezekiel 1:22

22 And the likeness of the firmament upon the heads of the living creatures was as the colour of the terrible chrystal , stretched forth over their heads above.

The appearance, or resemblance; of which word before, ver 16. and 13.

The living creatures, the wheels and these upon the Earth our Prophet had seen and mentioned, now he speaks of the Firmament which must be supposed to be stretcht forth above the Earth, as the Prophet saw the one so he saw the other. This Firmament was not that we behold, it was emblematical and representative. It appeared but much more August and wonderful then the Natural.

Not resting upon but over their heads stretcht out, and the Heb. were better read, over. in this place and on this occasion.

Heb. Eye a word twice already here use and in the same sense, the aspect and shape or form, as ver. 8.16.

For splendo r, purity, and solidity all that was above these creatures and wheels was beautiful and very majestical as indeed 'twas meet it should be, and 'tis therefore called terrible, because it impresseth a veneration upon the mind of the beholders, it dazleth eye and overpowereth it, the same word is used concerning the name of God, holy and revered, Psal. 99.3. and 111.9.