John the Apostle
Revelation 21:10KJV·traditional attribution

And he carried me away in the spirit to a great and high mountain, and shewed me that great city, the holy Jerusalem, descending out of heaven from God,

Matthew Henry Presbyterian

We have already considered the introduction to the vision of the new Jerusalem in a more general idea of the heavenly state; we now come to the vision itself, where observe, I. The person that opened the vision to the apostle - one of the seven angels, that had the seven vials full of the seven last plagues, Rev 21:9.

Commenting on Revelation 21:9-27

John Gill Reformed Baptist

And he carried me away in the Spirit,.... John was in an ecstasy, as in Rev 1:10 and in the thoughts and apprehensions of his mind and spirit, it seemed to him as if he was carried away from one place to another; for this was not a corporeal sight, nor were any of the visions he had, but what was represented to his mind...

Albert Barnes Presbyterian

Verse 10. And he carried me away in the spirit. Gave him a vision of the city; seemed to place him where he could have a clear view of it as it came down from heaven. . In a great and high mountain. The elevation, and the unobstructed range of view, gave him an opportunity to behold it in its glory. And showed me that great city, etc.