Spock: I picked this up from Doctor McCoy’s log. We have a crew member aboard who’s showing signs of stress and fatigue. Reaction time down nine to twelve percent, associational reading norm minus three.
Kirk: That’s much too low a rating.
Spock: He’s becoming irritable and quarrelsome, yet he refuses to take rest and rehabilitation. Now, He has that right, but we’ve found
Kirk: A crewman’s right ends where the safety of the ship begins. That man will go a shore on my orders. What’s his name?
Spock: James Kirk. Enjoy yourself, Captain.
Star Trek – Season 1: Episode 17 – “Shore Leave”