Profound and powerful forces are shaking and remaking our world. And the urgent question of our time is whether we can make change our friend and not our enemy.

When you're president, you have more power to help more people, but you also are the prisoner of circumstances as well, and countervailing political forces more.

You know the one thing that's wrong with this country? Everyone gets a chance to have their fair say.

If a President of the United States ever lied to the American people, he should resign.

I think you have you to give people the facts [about global warming], and then you have to tell them, this is not like drinking Castor Oil. There is a, an economically exciting way for us to create a whole new generation of American jobs without costing them an enormous amount of money or forcing them to change their lifestyle.

If you want to know where I come by the passionate commitment I have to bringing people together without regard to race, it all started with my grandfather.

Heavy as they are, the costs of action must be weighed against the price of inaction. If Saddam defies the world and we fail to respond, we will face a far greater threat in the future. Saddam will strike again at his neighbors; he will make war on his own people. And mark my words, he will develop weapons of mass destruction. He will deploy them, and he will use them.