We've achieved this historic progress through diplomacy, without resorting to another war in the Middle East. I want to also point out that by working with Iran on this nuclear deal, we were better able to address other issues.

Our journey is not complete until our gay brothers and sisters are treated like anyone else under the law.

[...] we must start by inspiring our children with a sense of purpose...by nurturing their imagination so that they may dream big and then work hard to reach those dreams. Too often, our children spend hours playing Playstation without ever finding out how to build Playstation. They watch television but never wonder how it's put together. They surf web page after web page on the Internet, but are never taught how to design one.

This was the moment when the rise of the oceans began to slow and our planet began to heal.

When you're a candidate and you say something that is inaccurate or controversial, it has less impact than it does when you're president of the United States. Everybody around the world's paying attention. Markets move. National security issues require a level of precision in order to make sure that you don't make mistakes.

If we choose only to expose ourselves to opinions and viewpoints that are in line to our own, we become more polarized, more set in our own ways. It will only reinforce and deepen the political divides in our country. But if we choose to actively seek out information that challenges our assumptions and beliefs, perhaps we can begin to understand where the people who disagree with us are coming from.

It is in the interests of all of us - the United States, China and the rest of the world - to make sure that the rules of the road are upheld. These rules and norms are part of the foundation of regional stability, and they have allowed nations across the region, including China, to grow and prosper.