City of Ember2008

Builder #1:
Secure the box. Set it for 200 years. We'll keep them in the city for 200 years.

[Builder #2 sets the years]

Builder #3:
You're certain that'll be long enough?

Builder #1:
None of us can be certain of anything. We can hope. Growing up with no knowledge of a world outside, future generations will be spared sorrow for what they've lost. [puts his glasses on] For the good of all mankind. [closes the box]