If I become so convinced that ‘I’m always right,’ the logical conclusion of that often ends up being great cruelty and great violence. - Barack Obama

It is entirely legitimate for the American people to be deeply concerned when you’ve got a bunch of violent, vicious zealots who behead people or randomly shoot a bunch of folks in a deli in Paris.

Well, first of all, let me say that I have never used Twitter. I noticed that young people — they're very busy with all these electronics. My thumbs are too clumsy to type in things on the phone. But I am a big believer in technology and I'm a big believer in openness when it comes to the flow of information. I think that the more freely information flows, the stronger the society becomes, because then citizens of countries around the world can hold their own governments accountable. They can begin to think for themselves. That generates new ideas. It encourages creativity. And so I've always been a strong supporter of open Internet use. I'm a big supporter of non-censorship.

With courage and purpose, with humility and with hope, with faith in the promise of tomorrow, let us march straightforward together, enduring allies in the cause of a world that is more peaceful, more prosperous, and more just.