Ezekiel 1:17

When they went, they went upon their four sides,.... On either of their crossing rings, as they were directed by the living creatures, at whose side they stood:

[and] they returned not when they went; they had no need to turn about when they were to go east, west, north, or south, as wheels usually do; but they turned upon the crossing ring, which was towards either of the four points. This denotes the perseverance of the churches, and the true members thereof, in faith and practice; they do not turn back, nor look back, but go right on, walking in the fear of the Lord, and in all his, ways and ordinances.