Out of body experiences
When you think about it, that's what the third person is like. Like a literal (as in, literature--pertaining to writing and paper, etc.) out-of-body experience. Think about what Paul went through when, they say, he was "caught up into paradise, and heard unspeakable words, which it is not lawful for a man to utter." (2 Corinthians 12:4) Opening the chapter, he says "I will come to visions and revelations of the Lord." He then continues with "I knew a man in Christ above fourteen years ago (whether in the body, I cannot tell; or whether out of the body, I cannot tell: God knoweth;) such an one caught up to the third heaven." In referring to himself in the third person, he's maintaining a necessary level of humility in the face of extraordinary blessing and favor and, how can I say this? God's attention. God was so pleased with Paul that he let him in on what was going on in, not just the first or second heavens, no. But the third(!).
"According as His divine power hath given unto us all things that pertain unto life and godliness, through knowledge of Him that hath called us to glory and virtue: Whereby are given unto us exceeding great and precious promises: that by these ye might be partakers of the divine nature, having escaped the corruption that is in the world through lust. And beside this..." (2 Peter 1:3-5a, emphasis mine)
Besides ourselves
I'd wager to say that Paul had so partook of the "divine nature" that God (originally divine) let him in on what he had to look forward to. From the above passage, Peter then continues by saying how there are things we must do. Any of various and several inward actions toward God that effectively change our thinking to be in line with His. Because, as Peter says, "His divine power hath given unto us all things that pertain unto life and godliness". These things are ours and we most definitively have been remade. This is truth. This is gospel. But until we make them our own, we won't live it as God intends. And please note, the root for "divine" is the same as "divide". Makes sense, doesn't it? We've been separated unto God and yet we're still here in our body. Time to get to work!
"And Jesus answered and said unto him, Blessed art thou, Simon Barjona: for flesh and blood hath not revealed it unto thee, but my Father which is in Heaven." (Matthew 16:17)
"But when it pleased God who separated me from my mother's womb, and called me by His grace, To reveal His Son in me, that I might preach Him among the heathen; immediately I conferred not with flesh and blood." (Galatians 1:15-16)
Out running gerunds
As you may know, a gerund is a noun form of a verb that ends in -ing. As in a writing. Or a "cutting". When the original word is but a verb and it's then turned into a "thing". Extrapolated out into scriptural life-correlation, think about all the things God asks us to do (parts of speech, in this case, notwithstanding) that He also expects us to realize--to make actual. We have all the provender necessary for our journey from this world to Heaven. God made sure of it through the sacrifice and resurrection of His Son ("For all things are yours" 1 Corinthians 3:21b) . And even if we have no one but God to rely upon in this world, we have Him. I find that Jesus, being the perfect human--humble unto death--embodies every quality of moral probity and ethical excellence expected by God to turn one into a saint. The spiritual recreation and deliverance that we would never be able to achieve being a free gift. And this is what we get when we believe on Him. It's ours but it necessarily will need to work itself out--of our body.
Fourth person?
He answered and said, Lo, I see four men loose, walking in the midst of the fire, and they have no hurt; and the form of the fourth is like the Son of God." (Daniel 3:25--the only usage of that phrase "Son of God" in the Old Testament)
Aside from this verse, I can't figure that one out.