When our memories outweigh our dreams, it is then that we become old.

Our military superiority is so great - it's far greater than it was in the Gulf War, and the Gulf War was over in 100 hours after we bombed for 43 days. And so now they can bomb for a couple of days and then just roll into Baghdad... The odds are there's going to be a war and it's going to be not for very long.

As we have throughout this century, we will lead with the power of our example, but be prepared, when necessary, to make an example of our power.

I think it's crazy for us to play games with our children's future. We know what's happening to the climate, we have a highly predictable set of consequences if we continue to pour greenhouse gases into the atmosphere.

The great thing about not being president anymore is I can say whatever I want, about anything. Of course [now], nobody really cares what I say. And now I have the worst of all worlds -- my wife has become the secretary of state, so no one really cares what I say -- unless I mess up.

For too long we've been told about 'us' and 'them.' Each and every election we see a new slate of arguments and ads telling us that 'they' are the problem, not 'us.' But there can be no 'them' in America. There's only us.

The purpose of politics is to give people tools to make the most of their lives.