Star Trek III: The Search for Spock (1984)

Captain Spock: My father says that you have been my friend. You came back for me.
Kirk: You would have done the same for me.
Captain Spock: Why would you do this?
Kirk: Because the needs of the one... Outweigh the needs of the many.
Captain Spock: [begins to remember] I have been and ever shall be your friend.
Kirk: Yes. Yes, Spock.
Captain Spock: The ship... Out of danger?
Kirk: You saved the ship. You saved us all. Don't you remember?
Captain Spock: Jim... Your name is Jim.
Kirk: Yes.

Kirk: You're suffering from a Vulcan mind-meld.
McCoy: That green blooded son-of-a-bitch! It's his revenge for all those arguments he lost!

Sarek: At what cost? Your ship...your son.
Kirk: If I hadn't the cost would have been my soul.

McCoy: Yes! Genesis! How can you be deaf with ears like that?!

[The crew watches the Enterprise burn up in the Genesis planet's atmosphere.]
Kirk: Dear God Bones, what have I done?
McCoy: What you had to do, what you've always done, turned death into a fighting chance to live.