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 (Whoever has seen me has seen the Father - John 14:9), and the Holy Spirit (The Spirit of the Lord is upon me - Luke 4:18).


King Saul's Explanation

Apostle John has mentioned Son Jesus Christ as Word(Son) with full of Grace(Father) and Truth(Holy Spirit) - 1.Then Samuel took a flask of oil and poured it on his head and kissed him and said, Has not the Lord anointed you to be prince over his people Israel? And you shall reign over the people of the Lord and you will save them from the hand of their surrounding enemies. And this shall be the sign to you that the Lord has anointed you to be prince over his heritage. 2.When you depart from me today, you will meet two men by Rachel's tomb in the territory of Benjamin at Zelzah, and they will say to you, The donkeys that you went to seek are found, and now your father has ceased to care about the donkeys and is anxious about you, saying, What shall I do about my son? 3.Then you shall go on from there farther and come to the oak of Tabor. Three men going up to God at Bethel will meet you there, one carrying three young goats, another carrying three loaves of bread, and another carrying a skin of wine. 4.And they will greet you and give you two loaves of bread, which you shall accept from their hand - 1 Samuel 10:1-4

That means when Christ was on the Cross, Father, Word(Son) and the Holy Spirit all of them suffered for our Salvation, To explain this in better way, Hannah brought three bullocks to the Temple, and sacrificed one bullock - Now when she had weaned him, she took him up with her, with three bulls, one ephah of flour, and a skin of wine, and brought him to the house of the Lord in Shiloh. And the child was young. Then they slaughtered a bull, and brought the child to Eli - 1 Samuel 1:24-25