Two simple "Motivationals" about Kirk and Spock dragged seemingly randomly off the web. But they say everything there is to say about Spock/Kirk in a nutshell.
Point 1. It was written into the script by the Author. This is not some stuff dreamed up by a load of numpties on the 'net. This is all FROM CANON. From TEXT, from SCRIPT. From THE HORSE'S MOUTH.
Point 2. As extended over the Original Movies, this is High Drama and probably THE GREATEST LOVE STORY EVER TOLD.
What am I talking about? Why, the Love Story that is Kirk and Spock, of course. Known in some circles as SPIRK.
The 1960s Series
You'll recall, some of you, that in the 1960s, HOMOSEXUALITY was very much a taboo thing.
(Huge understatement there!) If you referred to your partner at all, you referred to them as your "friend". Everything was very much kept under wraps and behind closed doors for fear of jobs being lost and utter and total social ostracisation It certainly wasn't something you put on TV!
Certainly, there is lots of FLIRTING etc between Kirk and Spock in the 1960s series but there is no evidence of anything more than that. See Video and note Spock's shame at feeling FRIENDSHIP for Kirk. (SUBTEXT is everything, people...)
Gene Roddenberry's Statements
In the 1979 autobiography, "Shatner; Where No Man", there is an interview with Gene Roddenberry, where the interviewer talks about Alexander the Great's homosexual love with Hephaistion, his close friend. Asked about this, if he saw the Kirk-Spock friendship as "two halves which come together to make a whole", Gene replied:
"Oh, yes. As I've said, I definitely designed it as a love relationship. I think that's what we're all about -- love, the effort to reach out to each other. I think that's a lovely thing. Also, dramatically, I designed Kirk and Spock to complete each other, and in fact the Kirk, Spock, McCoy triad to be the dramatic embodiment of the parts of one person: logic, emotion, and the balance between them. You cannot have an internal monologue on screen, so that is a way of personifying it, getting it out where it can be seen -- that internal debate which we all have within And I designed Kirk and Spock, as I told you, as dream images of myself, the two halves. But in terms of the characters, yes. That closeness. Absolutely."
So they were designed by Gene Roddenberry, Star Trek's creator, to have the closeness of Alexander and Hephaistion. OK. Nuff said.
The interview continues:
Marshak and Culbreath: "There's a great deal of writing in the Star Trek movement now which compares the relationship between Alexander and Hephaistion to the relationship between Kirk and Spock -- focusing on the closeness of the friendship, the feeling that they would die for one another --"
Roddenberry: "Yes, there's certainly some of that, certainly with love overtones. Deep love. The only difference being, the Greek ideal... we never suggested in the series... physical love between the two. But it's the... we certainly had the feeling that the affection was sufficient for that, if that were the particular style of the 23rd century."
Let me run that last paragraph by you again, slowly. They had the feeling that the affection between Kirk and Spock was sufficient for physical love to exist between the two of them. Got that bit?
Let me run a bit past you that you may have missed the importance of. Bearing in mind the fact that this interview was post "Star Trek: The Motion Picture" (1979). "We never suggested IN THE SERIES..." Did you get that this time? Star Trek The Motion Picture is a GAME CHANGER!
"Jim, when I feel friendship for you, I'm ashamed..."
Jim's reply is, "Love. You're better off without it, and I'm better off without mine..."
Please note, Jim knows exactly what Spock is referring to when he says "friendship".
He doesn't reply, "Friendship, you're better off without it". He says LOVE.