Related:

• It is the nature of our species to be free. -- Kirk, "Metamorphosis," stardate 3219.8.
• Love sometimes expresses itself in sacrifice. -- Kirk, "Metamorphosis," stardate 3220.3.
• The idea of male and female are universal constants. -- Kirk, "Metamorphosis," stardate 3219.8.
• We estimate there are millions of planets with intelligent life.
  We haven't begun to map them. -- Kirk, "Metamorphosis", stardate 3219.8....
• Martia: "Kirk, it's me, Martia. Listen, no one has ever escaped from Rura Penthe.
  Kirk: "Except us." -- "STVI:TUC", Stardate 9523.8...
• Computers make excellent and efficient servants, but I have no wish to serve under them.
  Captain, a starship also runs on loyalty to one man....
• Kor: "Would you like to try our little truth-finder?
  Kirk: "I don't understand it." Kor: "It's a mind-sifter....
• There's nothing disgusting about it [the Companion].
  It's just another life form, that's all. You get used to those things....
• Our species can only survive if we have obstacles to overcome.
  You remove those obstacles. Without them to strengthen us, we will weaken and die....