You know the old saying: you win some, you lose some... and then there's that little-known third category.

I'm old enough to know that a red carpet's just a rug, and I've been able to enjoy the pageantry without letting it go to my head.

The conversation on global warming has been stalled because a shrinking group of denialists fly into a rage when it's mentioned.

I drive a hybrid, and we've changed our light bulbs and windows and installed solar panels and geothermal ground source heat pumps and most everything else.

The Bush-Cheney administration had betrayed some basic American values. So there was hunger for change.

While President Bush likes to project an image of strength and courage, the real truth is that in the presence of his large financial contributors, he is a moral coward.

Civil disobedience has an honourable history, and when the urgency and moral clarity cross a certain threshold, then I think that civil disobedience is quite understandable, and it has a role to play.

I remember as a boy when the conversation on civil rights was won in the South. I remember a time when one of my friends made a racist joke and another said, 'Hey man, we don't go for that anymore.'

If the only tool we use to analyse what's valuable is a price tag, then those things that don't have price tags begin to look like they have no value.

I have faith in the United States and our ability to make good decisions based on the facts.

In digital era, privacy must be a priority. Is it just me, or is secret blanket surveillance obscenely outrageous?

As I have said for many years throughout this land, we're borrowing money from China to buy oil from the Persian Gulf to burn it in ways that destroy the future of human civilization. Every bit of that has to change.

Most people in politics draw energy from backslapping and shaking hands and all that. I draw energy from discussing ideas.

I was in elective politics for 24 years. I've made four national races, two for President, two for Vice President. I have found there are other ways to serve, and I'm enjoying them.

I've learned the importance of changing people's minds at the grassroots level so that whoever does run will have a much better chance of encountering public opinion that reaches a critical mass and brings about a change not only in White House policies but in the Congress and in the state legislatures and all around the world.

I did very extensive diligence on Al Jazeera English, the network from which Al Jazeera America is going to be derived, and it's really very clear that they have long since established a reputation for excellence and integrity and objectivity.

I think that more diversity is a good thing, and fresh points of view articulated by people who are committed to excellence in journalism is a beneficial change in the American media landscape.

I have always been fascinated with those who try to look over the horizon and see things that are coming at us.

There are skeptics who do not come to their view because they have a source of income from carbon polluters.

Today we're dumping 70 million tons of global-warming pollution into the environment, and tomorrow we will dump more, and there is no effective worldwide response. Until we start sharply reducing global-warming pollution, I will feel that I have failed.

It's not unusual to find big political shifts that take place beneath the surface before they're visible above the surface.

The presidency is more than a popularity contest.

The Internet empowers individuals to play a more active role in the political process, as Obama's campaign has manifested.

The golden thread of reason that used to be stretched taut to mark the boundary between the known and the unknown is now routinely disrespected.

I think it's harder for people than it should be. But as more and more of us become carbon neutral and change the patterns in our lives to be part of the solution instead of part of the problem, we are now beginning to see the changes in policy that are needed.

The struggle against poverty in the world and the challenge of cutting wealthy country emissions all has a single, very simple solution... Here it is: Put a price on carbon.

I see myself in the mold of Rin Tin Tin. It didn't go to his head either.

The dominance of short-term perspectives has led to routine decisions in the markets that sacrifice the long-term buildup of genuine value in pursuit of artificial, short-term gains.

The day I made that statement, about the inventing the internet, I was tired because I'd been up all night inventing the Camcorder.

The first less is this: take it from me, every vote counts.

CO2 is the exhaling breath of our civilization, literally... Changing that pattern requires a scope, a scale, a speed of change that is beyond what we have done in the past.

As human beings, we are vulnerable to confusing the unprecedented with the improbable. In our everyday experience, if something has never happened before, we are generally safe in assuming it is not going to happen in the future, but the exceptions can kill you and climate change is one of those exceptions.

A president who breaks the law is a threat to the very structure of our government.

It's a blessing to have work that feels fulfilling.

The Congress is virtually incapable of passing any reforms unless they first get permission from the powerful special interests who are most affected by the proposal.

For a free country to continue thriving, there have to be regular reforms, because any society, any economy that stays in place, you're going to see repeated attempts to exploit the openings for twisting policy to the advantage of those who already have wealth and power.

Consider what kind of car you get. Buy cars and other products that have the least impact environmentally.

The science linking the increased frequency and severity of extreme weather to the climate crisis has matured tremendously in the last couple of years.

How could this Y2K be a problem in a country where we have Intel and Microsoft?

Winston Churchill aroused this nation in heroic fashion to save civilisation in World War Two. We have everything we need except political will, but political will is a renewable resource.

Iraq's search for weapons of mass destruction has proven impossible to deter and we should assume that it will continue for as long as Saddam is in power.

There are many who would much prefer that the word 'climate' never be mentioned and that the issue be eliminated from our national conversation.

A low voter turnout is an indication of fewer people going to the polls.

We are going to have the best educated American people in the world.

Science has a culture that is inherently cautious and that is normally not a bad thing. You could even say conservative, because of the peer review process and because the scientific method prizes uncertainty and penalises anyone who goes out on any sort of a limb that is not held in place by abundant and well-documented evidence.

I pledge to you today that as president, in my first budget, I will introduce the largest increase in special education ever.

There's lots about politics I don't feel comfortable with. To talk about the politics of future ideas is impossible in soundbite form.

Hey, you know what, I've gotta go on that 'Letterman' show. That show is so lame.

When you have the facts on your side, argue the facts. When you have the law on your side, argue the law. When you have neither, holler.