The appearance of the wheels and their work [was] like unto the colour of a beryl: and they four had one likeness: and their appearance and their work [was] as it were a wheel in the middle of a wheel.
Ver. 16. The appearance of the wheels … was like unto the colour of a beryl.] Heb., As the eye or colour of Tarshish - i.e., the sea, or beryl, which is of a sea colour, even sea-green; whereby is represented the flux and fluctuating constitution of things here below.
And they four had one likeness.] There is the same instability of things in one place as in another, and the same overruling providence.
Their appearance and their work were as it were a wheel in the midst of a wheel.] God hath a wheel, providence, in all the wheeling businesses of the world. These are so one within another, as that all their motion dependeth on the angels, whom he also moderateth and ordereth at his own pleasure. Whensoever, therefore, we see such things come to pass that we can see no reason for - as the Churches overthrown, the wicked exalted, &c. - consider that one wheel is within another, and the wings of the angels are one within another. a
a Dr Preston.