"All things by Him [Jesus] & for Him were made." (Colossians 1:16)
There are many things in nature which God created that share many uncommon with the three persons of God and were made to testify that the Bible is true and for us to praise Him, as all things in nature should lead us to do. (Psalm 148) These things include the Sun, light, wind, water, & trees, which are all said in the Bible to be symbols of God.
Like the Son of God Jesus, the Sun appears to:
-descend from heaven to Earth
-disappear in a bloody death
-ascend into heaven
-come on the clouds of Heaven
-cannot be escaped anywhere on Earth for long [except in the deep sea for instance, which is a symbol of Rev. 9:11's Abyss of Hell where God cannot be sensed], as is said of God in Psalm 139
-gives life, as it says of Jesus "in Him was life & the life was the light of men" (John 1:4)
-brings the dead trees back to life, as Jesus says that when He comes all the dead will return to life (John 5:28); humans are compared to trees often in the Bible (ex. "every bad tree will be chopped down and thrown into the fire": Matt. 12)
-have existed before man existed, as it says of Jesus "in the beginning was the Word" (John 1:1)
-never die, although it eventually will when the Son of God replaces the Sun (Rev. 21-22)
-these are just a few of the extremely numerous & uncommon similarities discussed on http://www.primaryproofsofchristianity.com, which shows how the Bible reveals the meaning behind nature & all history
Thus, the Sun is a powerful witness to people all over the world that everything said about Jesus in the Bible is true.
Biblical Evidence that the Sun is a symbol of the Son of God
1) In Psalm 84:11, it says that “the LORD God is a sun and shield.” This is obviously metaphorical, for the Psalmist is very aware that God is not a body as the Sun is. The word “LORD” is a title for the Son of God as well as for the Father. However, all the following references connect the Sun with the God the Son, not God the Father.
2) The Son of God calls himself the “light of the world” (John 8:12), and the Sun is the most prominent light of the world that we can see with our eyes.
3) in Malachi 4:2, the last chapter of the Old Testament immediately followed by Jesus' genealogy, it is said "the Sun of Righteousness will rise with healing in his wings"; this is referring to Jesus the Son of God
4) Jesus’ face is said to shine “as the noon-day Sun” both during the Transfiguration (Matt. 17:2) and in Rev. 1:16. In the New Jerusalem, there is said to be no need for the Sun because of the light from God and His Son. (Rev. 21:23)
5) As the SON of God was “absent” from sight for THREE days after His body died, so was Jesus’s death accompanied by a THREE-hour absence of the SUN (Matt. 27:45); the SUN absent for THREE days to punish the Egyptians for sinning (Exodus 10:22-23); and the SUN’s light invisible to Paul for THREE days after the Son strikes Paul from Heaven with a blinding light. (Acts 9:3-5,9)
"He who believes in the Son has eternal life; but he that is disobedient to the Son shall not see life, but the wrath of God abides on him." (John 3:36)