Related:

• Power is danger. -- The Centurion, "Balance of Terror," stardate 1709.2.
• In this galaxy, there's a mathematical probability of three million Earth-type planets.
  And in all of the universe, three million, million galaxies like this....
• Another war...must it always be so? How many comrades have we lost in this way?
  ... Obedience. Duty. Death, and more death... -- Romulan Commander, "Balance of Terror," stardate 1709....
• First study the enemy. Seek weakness. -- Romulan Commander, "Balance of Terror," stardate 1709.2.
• Leave bigotry in your quarters; there's no room for it on the bridge.
  -- Kirk, "Balance of Terror," stardate 1709.2....
• Killing is stupid; useless! -- McCoy, "A Private Little War," stardate 4211.8.
• Never go into a hug off balance.
• The only solution is...a balance of power. We arm our side with exactly that much more.
  A balance of power -- the trickiest, most difficult, dirtiest game of them all....
• McCoy: "Never rains, but it pours." Kirk: "As a physician you of all people should appreciate the dangers of reopening old wounds.
  McCoy: "Sorry." -- "STII:TWOK", Stardate 8130.4...