- "Of all the souls I have encountered in my travels... His was the most... human." Doubles as an EPIC Tear Jerker.
- Kirk, perhaps remembering how badly things went when he stripped Decker of command several years ago, is very reluctant to take command of the Enterprise, telling Spock he'll just observe, and Spock will stay in command. Spock calmly gives Kirk every reason why Kirk should go ahead and take over, and finally says, basically, "What are you beating yourself up for? We're good."
- Speaking of Decker, when Kirk is equivocating about whether or not he should assume command, Spock says "I have no ego to bruise." Basically telling Kirk that, unlike Decker, Spock won't take the transfer of commander personally, and that he'll continue to perform as an exemplary First and Science Officer under Kirk's command. Nice to know that Matthew Decker, his issues and his sacrifice, are remembered.
- "You are my superior officer. You are also my friend. I have been and always shall be yours." It has a heartbreaking callback later, but the initial moment warms the heart indeed. Perhaps even more heartwarming in the way Spock says it—a simple, matter-of-fact utterance, as though it's an essential, inevitable and natural part of who he is. He could have been reeling off "Spock, son of Sarek and Amanda, Science Officer and First Officer of the Starship Enterprise, friend to Captain James T. Kirk..." And considering Spock's personality, for him to matter-of-factly accept any emotion whatsoever...! Yeah. Whatever the nature of their relationship was, those two men loved each other.
- "I have always been, and always shall be, your friend. Live long... and prosper."
- The reconciliation scene between Kirk and his son David: "I'm proud... very proud... to be your son."
- The needs of the many outweigh the needs of the few.
- ...or the one.
- Spock giving his katra to Bones. Talk about the ultimate expression of trust.
- Especially considering their relationship on the show- finding a scene where the two weren't sniping at one another for one reason or another in their own way (Bones in his hot-blooded, emotional rhetoric, Spock in his cool, deadpan, logical manner) is hard to find. To know that Spock trusted Bones enough despite- or perhaps because of- this... it's heartwarming.
- "I feel... young." The whole theme of new life and new beginnings, even after death and tragedy, is truly heartwarming.
- Over the course of the TV series and films we've seen Spock and Bones argue about just about anything but in this film they are both in total agreement, albeit in different scenes, that Jim accepting promotion was a huge mistake on his part and they urge him to get back his command. It's nice to see them finally agree on something.
- Bones' last line of the movie, especially now that Leonard Nimoy has passed away.McCoy: He's not really dead, as long as we remember him.
- A subtle moment is when Spock has Saavik pilot the Enterprise out of spacedock. Yes, he's trolling Kirk, yes, it's an easy maneuver, and yes, Sulu is at the helm so nothing can go wrong, but at the end of the day Saavik gets to be in command of a real starship rather than a simulator. That's the dream of any Academy cadet. In that moment, Spock is essentially being a proud parent, demonstrating the trust he has in his "child" and showing off her skill to Kirk and McCoy, his best friends.
Heartwarming / Star Trek II: The Wrath of Khan