That still is taken from the Mirror, Mirror episode of Star Trek, when a transporter accident causes Kirk, McCoy, Scotty, and Uhura to trade places with their evil twins on the Imperial Star Ship Enterprise. The episode contains this classic exchange between (evil) Spock and (“good”) Kirk:

(Spock): Terror must be maintained, or the empire is doomed. It is the logic of history.

(Kirk): Conquest is easy. Control is not. We may have bitten off more than we can chew!

I watched this episode at the CBS Television website last night after reading this article on Common Dreams by William Astore, in which he highlights the defining traits of life on the “evil” Enterprise:

Let’s recap: Alien cultures shocked, awed, and bludgeoned into submission in order to gain control over scarce energy resources; torture used liberally to extract information; precision weapons capable of decapitating the enemy and controlled from a distance via the push of a button.