Related:

• 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....
• There are certain universal ideas and concepts common to all intelligent life.
  This device [the universal translator] instantaneously compares the frequency of brain wave patterns, selects those ideas and concepts it recognizes, and then provides the necessary grammar....
• Kirk: "Captain's Log, Stardate 9529.1. This is the final cruise of the Starship Enterprise under my command.
  This ship and her history will shortly become the care of a new generation....
• To all mankind -- may we never find space so vast, planets so cold, heart and mind so empty that we cannot fill them with love and warmth -- Garth, "Dagger of the Mind," stardate 2715.
  2....
• I think they're going to take all this money that we spend now on war and death -- And make them spend it on life.
  -- Edith Keeler and Kirk, "The City on the Edge of Forever," stardate unknown....
• 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.
• Kirk: "Well, at least we have them all together." Spock
  Fortuitous, Captain." -- "Catspaw", Stardate 3018.2....