“And I saw heaven opened, and behold, a white horse; and he that sat upon him was called Faithful and True, and in righteousness he doth judge and make war. His eyes were as a flame of fire, and on his head were many crowns; and he had a name written, that no man knew, but he himself. And he was clothed with a vesture dipped in blood: and his name is called, The Word of God.” (Revelation 19:11-13, Webster)

As Verse 11 begins, it shares the final Prophetic hour regarding the Second Coming, without a doubt the greatest moment in human history. Christ is literally returning on a war horse as seen in Zecheriah 14:3. Christ Jesus has been totally faithful to His Promises and True to His Judgments; He contrasts with the false Messiah of Revelation 6:2, who was neither faithful nor true.
The flame in His eyes represents Judgment and the crowns represent the fact that He will not be Lord of just one realm; He will be Lord of all realms. When you read that He hads a Name written, that no man knows other than Christ Himself, it does not mean that it is unknown, but rather it is definitely unknowable; it will remain unreachable to man, meaning that its depths can never be fully plumbed.
His vesture dipped in blood this speaks of the Cross where He shed His Life’s Blood, which gives Him the right to Judge the world. Some interpreters also connect it to Isaiah 63:2–3, where God’s garments are stained from treading the winepress of wrath, symbolizing His victory over evil.
His revealed name, “the Word of God” ties the passage directly to John 1:1, 14. Christ is the living Word who makes God known; He is both revelation and redeemer.
So when believers say “I know Him,” it expresses not full comprehension, as previously mentioned by depths never fully plumbed, but true relationship through faith.