Come, then, let us go forward together with our united strength - and win a better future for generations to come.

Audacity is the currency for authoritarians.

You can't lead anybody you don't love. You can't do it. It's not possible.

I don't put myself above anyone, and I have as many shortcomings as any non-believer. I just choose to turn to a higher power to help me gain wisdom and, I hope, improve over time.

The government also has to get the public rules right. That means putting a price on carbon, so the cleaner forms of energy become more competitive. As soon as that happens, a tidal wave of new capital, innovation and entrepreneurship will flood into the clean energy space - creating new jobs and opportunities for Americans of all walks of life. We did that for the internet, with public investments in the basic system through the Pentagon, followed by rules that encouraged innovation and competition. And that is why the internet took off in the United States first.

You don't get fewer followers saying outrageous stuff on Twitter.

I've never launched any initiative or campaign that people thought was a slam dunk.