His eyes were as a flame of fire - See the notes on Revelation 1:14.
And on his head were many crowns - Many diadems, indicative of his universal reign. It is not said how these were worn or arranged on his head - perhaps the various diadems worn by kings were in some way wreathed into one.
And he had a name written - That is, probably on the frontlet of this compound diadem. Compare the notes on Revelation 13:1; Revelation 14:1.
That no man knew but he himself - See the notes on Revelation 2:17. This cannot here mean that no one could read the name, but the idea is, that no one but himself could fully understand its import. It involved a depth of meaning, and a degree of sacredness, and a relation to the Father, which he alone could apprehend in its true import. This is true of the name here designated - “the Word of God” - the “Logos” - Λόγος Logos; and it is true of all the names which he bears. See Matthew 11:27. Compare a quotation from Dr. Buchanan in the Asiatic Researches, vol. 1, vi. p. 264, as quoted by Rosenmuller, Morgenland, in loco.