To the families of those we've lost; to all who called them friends; to the students of this university, the public servants gathered tonight, and th… - Barack Obama

The problem is that this kind of vilification and over-the-top rhetoric closes the door to the possibility of compromise. It undermines democratic deliberation. It prevents learning –- since, after all, why should we listen to a “fascist,” or a “socialist,” or a “right-wing nut,” or a left-wing nut”?

It makes it nearly impossible for people who have legitimate but bridgeable differences to sit down at the same table and hash things out. It robs us of a rational and serious debate, the one we need to have about the very real and very big challenges facing this nation. It coarsens our culture, and at its worst, it can send signals to the most extreme elements of our society that perhaps violence is a justifiable response.

So what do we do? As I found out after a year in the White House, changing this type of politics is not easy. And part of what civility requires is that we recall the simple lesson most of us learned from our parents: Treat others as you would like to be treated, with courtesy and respect. (Applause.) But civility in this age also requires something more than just asking if we can’t just all get along.

I've said before that one of the great strengths of the United States is--although, as I mentioned, we have a very large Christian population, we do not consider ourselves a Christian nation or a Jewish nation or a Muslim nation; we consider ourselves a nation of citizens who are bound by ideals and a set of values.

I believe a government that suppresses peaceful dissent is not showing strength; it is showing weakness and it is showing fear. History shows that regimes who fear their own people will eventually crumble, but strong institutions built on the consent of the governed endure long after any one individual is gone. That's why our strongest leaders -- from George Washington to Nelson Mandela -- have elevated the importance of building strong, democratic institutions over a thirst for perpetual power. Leaders who amend constitutions to stay in office only acknowledge that they failed to build a successful country for their people -- because none of us last forever. It tells us that power is something they cling to for its own sake, rather than for the betterment of those they purport to serve.