I was brought up to believe that the only thing worth doing was to add to the sum of accurate information in the world.

A small group of thoughtful people could change the world. Indeed, it's the only thing that ever has.

Never doubt that a small group of thoughtful, committed citizens can change the world; indeed, it's the only thing that ever has.

The world hates change, yet it is the only thing that has brought progress.

Happiness is the only thing worth fighting for in your life.

Cham is the only thing to screw one up when one is down a peg.