Temple Veil 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
And in another place, Apostle John has mentioned Son Jesus Christ as Word(Son) with full of Grace(Father) and Truth(Holy Spirit) - And the Word became flesh and dwelt among us, and we have seen his glory, glory as of the only Son from the Father, full of Grace and Truth - John 1:14
Temple Veil's Explanation
Bible tells that the temple curtain was made with three unique colors of materials which represents Father, Son(Word) and the Holy Spirit - He also made a curtain for the doorway of the tent, of violet, purple, and scarlet material, and fine twisted linen, the work of a weaver - Exodus 36:37
so basically the Temple Curtain is the representation of Jesus Christ who is the image of Trinity God(Father, Word and the Holy Spirit), that was the reason the Temple curtain was torn when Christ died on the cross, and the torn curtain tells that now we can come to the holy God - 37.And Jesus cried with a loud voice, and gave up the ghost. 38.And the veil of the temple was rent in twain from the top to the bottom - Mark 15:37-38