Exiles Explanation
Apostle John who was with Christ until his last moment of the crucifixion, has revealed that Jesus Christ is not the image of Word alone, but the Image of Father, Word and the Holy Spirit, and we must believe in him to overcome this world - 5.Who is it that overcomes the world? Only the one who believes that Jesus is the Son of God. 6.This is the one who came by water and blood—Jesus Christ. He did not come by water only, but by water and blood. And it is the Spirit who testifies, because the Spirit is the truth - 1 John 5:5-6
To understand this in a better way, apostle John first explaining the Trinity of our Heavenly Father as Father, Word and Holy Spirit - because there are three who are testifying in Heaven: the Father, the Word, and the Holy Spirit, and these three are one - 1 John 5:7
And then he explained about the Son Jesus Christ, that Jesus had all three of them(Father, Son, and the Holy Spirit) in him - and there are three who are testifying in the earth: the Spirit(Holy Spirit), and the water(Word), and the blood(Father) and the three are into the one(Jesus Christ) - 1 John 5:8
That was the reason Apostle Paul is saying that Jesus Christ is the Image of the invisible God - The Son is the image of the invisible God, the firstborn over all creation - Colossians 1:15 that means in Jesus Christ we can see the Son (The Word became flesh - John 1:14), and our Heavenly Father (Father is in me - John 10:38), and the Holy Spirit (Spirit of the Lord is upon me - Luke 4:18).
Exile's Explanation
God reveled his plan through prophet Zechariah, and here two mountains are representing first and second coming of Jesus Christ - Again I lifted my eyes and saw, and behold, four chariots came out from between two mountains. And the mountains were mountains of bronze - Zechariah 6:1
And the three chariot with horses are representing the Trinity God (Word, the Father, and the Holy Spirit), and it's really hard to understand for any human being, that was the reason Prophet Zechariah using Godly people as a representation to explain it.
And the dual character of fourth chariot and horses are representing first and second coming of Jesus Christ, the Son of God.
And finally prophet Zechariah wrote about the Heavenly vision and the victory of our Lord Jesus Christ - 14.And the crowns shall be to Helem, and to Tobijah, and to Jedaiah, and to Hen the son of Zephaniah, for a memorial in the temple of the Lord. 15.And they that are far off shall come and build in the temple of the Lord, and ye shall know that the Lord of hosts hath sent me unto you. And this shall come to pass, if ye will diligently obey the voice of the Lord your God - Zechariah 6:14-15