Related:

• Where there's no emotion, there's no motive for violence.
  -- Spock, "Dagger of the Mind", stardate 2715.1...
• You have here an unusual opportunity to appraise the human mind, or to examine, in Earth terms, the roles of good and evil in a man.
  His negative side, which you call hostility, lust, violence...
• Spock: "I know of your mind meld with my father, which enabled him to complete his last mission.
  Picard: "It was an honor. He's a great man." Spock...
• If you need a physician, employ these three: a cheerful mind, rest, and a temperate diet.
• Spock: "Captain, I will not be coming with you." Picard
  Ambassador--" Spock: "The reason for my coming here has never been more clear....
• It is generally agreed that those people who agree with you are ranked in your mind as intelligent.
• If you want to hit, use a dagger.
• Spock: "I sense you have a closed mind, Captain. Closed minds have kept these two worlds apart for centuries.
  In the Federation, we have learned from experience to view the Romulans with distrust....
• Without facts, the decision cannot be made logically.
  You must rely on your human intuition. -- Spock, "Assignment: Earth", stardate unknow...