Albert Barnes Commentary Ezekiel 1:26

"And above the firmament that was over their heads was the likeness of a throne, as the appearance of a sapphire stone; and upon the likeness of the throne was a likeness as the appearance of a man upon it above." — Ezekiel 1:26 (ASV)

Sapphire - Clear heavenly blue.

The appearance of a man - Deeply significant is the form of this manifestation. Here is no angel conveying God’s message to man, but the glory of the Lord Himself.

We recognize in this vision the prophetic annunciation of the Holy Incarnation. We are told little of the extent to which the human form was made evident to the prophet.

For the vision was rather to the mind than to the bodily eye. Even inspired language was inadequate to convey to the hearer the glory which eye hath not seen or ear heard, and which only by special revelation it has entered into the heart of man to conceive.