Edith: You know as well as I do how out of place you two are around here. 

Spock: Interesting. Where would you estimate we belong, Miss Keeler? 

Edith: You? At his side, as if you’ve always been there and always will. And you? You belong in another place. I don’t know where or how. I’ll figure it out eventually. 

Spock: I’ll finish with the furnace. 

Edith: …Captain. Even when he doesn’t say it, he does.

Star Trek — Season 1: Episode 28 — “The City on the Edge of Forever”