"Sharing is the essence of teaching and learning. It is, I have come to believe, the essence of civilization. The impulse to share turns politics from the mere pursuit of power, makes of journalism a public service, and is the driving force behind any scientific endeavor. It inspires art, builds cities, and spreads knowledge. Without it, the imagination is but the echo of the self, trapped in a soundproof chamber, reverberating upon itself until it is spent in exhaustion or futility." -adapted from author Bill Moyers