My particular passion for Lincoln dates back from my earliest memories of politics.

Around the world, Gandhi, Nelson Mandela -- what they did was hard. It takes time. It takes more than a single term. It takes more than a single president. It takes more than a single individual.

A lot of countries have advanced capabilities. And given the vulnerabilities of our infrastructure and our economies to digital platforms, we have to be careful in making sure that this doesn't become a lawless, low-level battlefield.

Here in the United States, hopefully, what we're building are not just pyramids, are not icons to one pharaoh. What we're building is a culture and a way of living together that we can look back on and say, [This] was good, was inclusive, was kind, was innovative, was able to fulfill the dreams of as many people as possible.

We will remember that we are not as divided as our politics suggests; that we are one people; we are one nation and together, we will begin the next great chapter in the American story with three words that will ring from coast to coast, from sea to shining sea:- Yes. We. Can.

Muslim leaders around the globe have to continue working with us to decisively and unequivocally reject the hateful ideology that groups like ISIL and al Qaeda promote. To speak out against not just acts of violence, but also those interpretations of Islam that are incompatible with the values of religious tolerance, mutual respect, and human dignity.

We can't just drill our way out of the energy and climate challenge that we face.