Related:

• We Klingons believe as you do -- the sick should die.
  Only the strong should live. -- Kras, "Friday's Child," stardate 3497.2....
• McCoy: "I'm a doctor, not an escalator." -- "Friday's Child", Stardate 3497.2.
• They're offering you a chance for combat. They consider it more pleasurable than love.
  -- McCoy, "Friday's Child," stardate 3497.2....
• The sight of death frightens them [Earthers]. -- Kras the Klingon, "Friday's Child," stardate 3497.
  2....
• 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....
• bacteriological warfare...hard to believe we were once foolish enough to play around with that.
  -- McCoy, "The Omega Glory," stardate unknown....
• We believe men should fight their own battles. Only the weak will die.
  -- Proconsul Marcus Claudius, "Bread and Circuses," stardate 4041.2....
• Earthmen fear to bargain honestly. -- Kras the Klingon, "Friday's Child," stardate 3497.2.
• To live is always desirable. -- Eleen the Capellan, "Friday's Child," stardate 3498.9.