[I decided to have this here instead of the Movie forum, because I think it's more about Spock's overall personality than the one scene in TMP.]
So, I just finished reading the four different versions of the end of the Enterprise's five-year mission (three comics and a novel, if anyone's counting), and each of them featured some event wherein Spock's inability to completely control his emotions causes (or at least threatens) great harm to someone else, making him decide to pursue the Kolinahr discipline.
I don't think such a rationalization is at all necessary. My personal opinion about the situation is that Spock during the series was generally overcompensating for his human half by acting uber-Vulcan. So, if something made Spock decide he didn't need to be in Starfleet anymore (such as Kirk taking the promotion), his obvious next choice would be to do the uber-Vulcan and purge all of his emotions. No explanations necessary. It seems pretty straightforward to me, or am I oversimplifying?
So, I just finished reading the four different versions of the end of the Enterprise's five-year mission (three comics and a novel, if anyone's counting), and each of them featured some event wherein Spock's inability to completely control his emotions causes (or at least threatens) great harm to someone else, making him decide to pursue the Kolinahr discipline.
I don't think such a rationalization is at all necessary. My personal opinion about the situation is that Spock during the series was generally overcompensating for his human half by acting uber-Vulcan. So, if something made Spock decide he didn't need to be in Starfleet anymore (such as Kirk taking the promotion), his obvious next choice would be to do the uber-Vulcan and purge all of his emotions. No explanations necessary. It seems pretty straightforward to me, or am I oversimplifying?