Sarek's original intent was not about restoring the Katra to a brain (or arc which was not mentioned on screen). when he approached Kirk, it was about returning that living spirit to Vulcan, as Sarek (and Kirk--at the time) did not know Spock's body had been restored.
Sarek's dialogue cannot be misunderstood--he refers to the Katra as a living spirit. It is not telepathy, or the physcial mirror of a hard drive: the entir essence of a being--the soul--is contained in the Katra, and you have yet to apply a plausible scientific explanation for the Katra...because science was not intended to have anything to do with the process.
I cannot scientifically explain how transporter works, but in context of the show it's not magic; Scotty knows how it works. Similarly I assume Vulcans have scientific understanding of Katras, even though the details are not spelled out on the screen.
What do you assume the Vulcans do with the Katras? Why, if they are souls in Christian sense you need to but them into a physical containers?
Spock was not intelligent and hardly self-aware while growing on the Genesis planet. Animal instincts are not thoughts. That left with his Katra in McCoy's mind. [/QUOTE]
What sort of mental faculties you'd assume a few days old person to posses? Considering his age, he seemed pretty smart.
Also, how could Spock function just fine in STII after he had transeffer his Katra to McCoy? It was not transferring the Katra that wiped his mind, it was dying that did that. Katra is just a backup of one's mind.
How Katras exactly work is left vague, and we can argue about details all day, but there is no reason to assume that anything magical is going on there anymore than with any strange phanomenon they encounter in Trek all the time. Mystical/Magical/Supernatural explanations are never even considered in Trek. There are only things that they understand scientifically and things they do not yet understand scientifically.
Tone means everything: Uhura said it as an emotionally upbeat, matter-of-fact statement of Christ's true identity, otherwise she would have described Christ as you do (or like many Muslims) as just some random philosopher who does not have a divine origin.
Yeah, that's quite slim evidence. Tone of her voice. Maybe she was a Christian, but that really isn't conclusive evidence in any way.
He applies his beliefs in various situations, referred to Biblical scripture and has used it in one of his many arguments with Spock.
I can quote Bible, Edda, Kalevala or even Lord of the Rings to made a point, that does not mean that I believe supernatural things in those books are true.
Again, he may be a Christian, but the evidence just isn't there.